51676665660 has 96 divisors (see below), whose sum is σ = 161192263680. Its totient is φ = 13744408896.

The previous prime is 51676665641. The next prime is 51676665683. The reversal of 51676665660 is 6656667615.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 51676665597 and 51676665606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81889 + ... + 331751.

It is an arithmetic number, because the mean of its divisors is an integer number (1679086080).

Almost surely, 2^51676665660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51676665660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80596131840).

51676665660 is an abundant number, since it is smaller than the sum of its proper divisors (109515598020).

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

51676665660 is a wasteful number, since it uses less digits than its factorization.

51676665660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250264 (or 250256 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 51676665660 in words is "fifty-one billion, six hundred seventy-six million, six hundred sixty-five thousand, six hundred sixty".