660841632 has 192 divisors, whose sum is σ = 2171473920. Its totient is φ = 193708800.

The previous prime is 660841619. The next prime is 660841633. The reversal of 660841632 is 236148066.

660841632 is a `hidden beast` number, since 6 + 608 + 4 + 16 + 32 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (660841633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 293503 + ... + 295745.

It is an arithmetic number, because the mean of its divisors is an integer number (11309760).

Almost surely, 2^660841632 is an apocalyptic number.

660841632 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660841632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085736960).

660841632 is an abundant number, since it is smaller than the sum of its proper divisors (1510632288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660841632 is a wasteful number, since it uses less digits than its factorization.

660841632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 660841632 is about 25706.8401792208. The cubic root of 660841632 is about 871.0286999374.

Adding to 660841632 its reverse (236148066), we get a palindrome (896989698).

The spelling of 660841632 in words is "six hundred sixty million, eight hundred forty-one thousand, six hundred thirty-two".