51656511166666 has 32 divisors (see below), whose sum is σ = 93458137743360. Its totient is φ = 20918559654576.

The previous prime is 51656511166613. The next prime is 51656511166753. The reversal of 51656511166666 is 66666111565615.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253419546 + ... + 253623301.

It is an arithmetic number, because the mean of its divisors is an integer number (2920566804480).

Almost surely, 2^{51656511166666} is an apocalyptic number.

51656511166666 is a deficient number, since it is larger than the sum of its proper divisors (41801626576694).

51656511166666 is a wasteful number, since it uses less digits than its factorization.

51656511166666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507043258.

The product of its digits is 34992000, while the sum is 61.

The spelling of 51656511166666 in words is "fifty-one trillion, six hundred fifty-six billion, five hundred eleven million, one hundred sixty-six thousand, six hundred sixty-six".