660400350576 has 20 divisors (see below), whose sum is σ = 1706034239112. Its totient is φ = 220133450176.

The previous prime is 660400350529. The next prime is 660400350593. The reversal of 660400350576 is 675053004066.

660400350576 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×660400350576² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6879170271 + ... + 6879170366.

Almost surely, 2^660400350576 is an apocalyptic number.

It is an amenable number.

660400350576 is an abundant number, since it is smaller than the sum of its proper divisors (1045633888536).

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

660400350576 is a wasteful number, since it uses less digits than its factorization.

660400350576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13758340648 (or 13758340642 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

The spelling of 660400350576 in words is "six hundred sixty billion, four hundred million, three hundred fifty thousand, five hundred seventy-six".