51500101666 has 16 divisors (see below), whose sum is σ = 83402041464. Its totient is φ = 23709400704.

The previous prime is 51500101637. The next prime is 51500101691. The reversal of 51500101666 is 66610100515.

51500101666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 34123325625 + 17376776041 = 184725^2 + 131821^2 .

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, 2484355 + ... + 2504998.

Almost surely, 2^51500101666 is an apocalyptic number.

51500101666 is a deficient number, since it is larger than the sum of its proper divisors (31901939798).

51500101666 is a wasteful number, since it uses less digits than its factorization.

51500101666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989765.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 51500101666 in words is "fifty-one billion, five hundred million, one hundred one thousand, six hundred sixty-six".