660397357756 has 12 divisors (see below), whose sum is σ = 1171972776240. Its totient is φ = 325547993120.

The previous prime is 660397357747. The next prime is 660397357757. The reversal of 660397357756 is 657753793066.

It is a happy number.

It is a super-2 number, since 2×660397357756² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660397357757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1162671121 + ... + 1162671688.

It is an arithmetic number, because the mean of its divisors is an integer number (97664398020).

Almost surely, 2^660397357756 is an apocalyptic number.

It is an amenable number.

660397357756 is a deficient number, since it is larger than the sum of its proper divisors (511575418484).

660397357756 is a wasteful number, since it uses less digits than its factorization.

660397357756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325342884 (or 2325342882 counting only the distinct ones).

The product of its (nonzero) digits is 150028200, while the sum is 64.

The spelling of 660397357756 in words is "six hundred sixty billion, three hundred ninety-seven million, three hundred fifty-seven thousand, seven hundred fifty-six".