51066561624 has 64 divisors (see below), whose sum is σ = 143464608000. Its totient is φ = 15029621376.

The previous prime is 51066561619. The next prime is 51066561631. The reversal of 51066561624 is 42616566015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3550974 + ... + 3565325.

It is an arithmetic number, because the mean of its divisors is an integer number (2241634500).

Almost surely, 2^51066561624 is an apocalyptic number.

It is an amenable number.

51066561624 is an abundant number, since it is smaller than the sum of its proper divisors (92398046376).

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

51066561624 is a wasteful number, since it uses less digits than its factorization.

51066561624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7116344 (or 7116340 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 51066561624 in words is "fifty-one billion, sixty-six million, five hundred sixty-one thousand, six hundred twenty-four".