660612852 has 144 divisors (see below), whose sum is σ = 1789132800. Its totient is φ = 205208640.

The previous prime is 660612839. The next prime is 660612857. The reversal of 660612852 is 258216066.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660612857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5201613 + ... + 5201739.

Almost surely, 2^660612852 is an apocalyptic number.

660612852 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 660612852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894566400).

660612852 is an abundant number, since it is smaller than the sum of its proper divisors (1128519948).

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

660612852 is a wasteful number, since it uses less digits than its factorization.

660612852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 660612852 is about 25702.3900056006. The cubic root of 660612852 is about 870.9281731059.

The spelling of 660612852 in words is "six hundred sixty million, six hundred twelve thousand, eight hundred fifty-two".