51668616078246 has 64 divisors (see below), whose sum is σ = 105281597546496. Its totient is φ = 16900205116800.

The previous prime is 51668616078193. The next prime is 51668616078259. The reversal of 51668616078246 is 64287061686615.

It is a happy number.

It is a super-2 number, since 2×51668616078246² (a number of 28 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 31 ways as a sum of consecutive naturals, for example, 259219795 + ... + 259419041.

It is an arithmetic number, because the mean of its divisors is an integer number (1645024961664).

Almost surely, 2^{51668616078246} is an apocalyptic number.

51668616078246 is an abundant number, since it is smaller than the sum of its proper divisors (53612981468250).

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

51668616078246 is a wasteful number, since it uses less digits than its factorization.

51668616078246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200997.

The product of its (nonzero) digits is 139345920, while the sum is 66.

The spelling of 51668616078246 in words is "fifty-one trillion, six hundred sixty-eight billion, six hundred sixteen million, seventy-eight thousand, two hundred forty-six".