657135660 has 24 divisors (see below), whose sum is σ = 1839980016. Its totient is φ = 175236160.

The previous prime is 657135637. The next prime is 657135701. The reversal of 657135660 is 66531756.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5476071 + ... + 5476190.

It is an arithmetic number, because the mean of its divisors is an integer number (76665834).

Almost surely, 2^657135660 is an apocalyptic number.

657135660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

657135660 is an abundant number, since it is smaller than the sum of its proper divisors (1182844356).

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

657135660 is a wasteful number, since it uses less digits than its factorization.

657135660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10952273 (or 10952271 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 657135660 is about 25634.6573997001. The cubic root of 657135660 is about 869.3974159987.

The spelling of 657135660 in words is "six hundred fifty-seven million, one hundred thirty-five thousand, six hundred sixty".