51040402666 has 16 divisors (see below), whose sum is σ = 87151992768. Its totient is φ = 22191479200.

The previous prime is 51040402657. The next prime is 51040402739. The reversal of 51040402666 is 66620404015.

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, 50434675 + ... + 50435686.

It is an arithmetic number, because the mean of its divisors is an integer number (5446999548).

Almost surely, 2^51040402666 is an apocalyptic number.

51040402666 is a deficient number, since it is larger than the sum of its proper divisors (36111590102).

51040402666 is a wasteful number, since it uses less digits than its factorization.

51040402666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100870397.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 51040402666 in words is "fifty-one billion, forty million, four hundred two thousand, six hundred sixty-six".