660908796 has 96 divisors (see below), whose sum is σ = 1700455680. Its totient is φ = 198933504.

The previous prime is 660908791. The next prime is 660908803. The reversal of 660908796 is 697809066.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660908791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516910 + ... + 518186.

It is an arithmetic number, because the mean of its divisors is an integer number (17713080).

Almost surely, 2^660908796 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660908796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850227840).

660908796 is an abundant number, since it is smaller than the sum of its proper divisors (1039546884).

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

660908796 is a wasteful number, since it uses less digits than its factorization.

660908796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 660908796 is about 25708.1464909472. The cubic root of 660908796 is about 871.0582076576.

The spelling of 660908796 in words is "six hundred sixty million, nine hundred eight thousand, seven hundred ninety-six".