51660456 has 32 divisors (see below), whose sum is σ = 130364640. Its totient is φ = 17058368.

The previous prime is 51660443. The next prime is 51660463. The reversal of 51660456 is 65406615.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7491 + ... + 12626.

It is an arithmetic number, because the mean of its divisors is an integer number (4073895).

Almost surely, 2^51660456 is an apocalyptic number.

It is an amenable number.

51660456 is an abundant number, since it is smaller than the sum of its proper divisors (78704184).

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

51660456 is a wasteful number, since it uses less digits than its factorization.

51660456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20233 (or 20229 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 51660456 is about 7187.5208521437. The cubic root of 51660456 is about 372.4369360080.

The spelling of 51660456 in words is "fifty-one million, six hundred sixty thousand, four hundred fifty-six".