50666666565 has 16 divisors (see below), whose sum is σ = 81535264128. Its totient is φ = 26866022976.

The previous prime is 50666666549. The next prime is 50666666591. The reversal of 50666666565 is 56566666605.

It is not a de Polignac number, because 50666666565 - 2⁴ = 50666666549 is a prime.

It is a super-2 number, since 2×50666666565² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9759769 + ... + 9764958.

It is an arithmetic number, because the mean of its divisors is an integer number (5095954008).

Almost surely, 2^50666666565 is an apocalyptic number.

It is an amenable number.

50666666565 is a deficient number, since it is larger than the sum of its proper divisors (30868597563).

50666666565 is a wasteful number, since it uses less digits than its factorization.

50666666565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19524908.

The product of its (nonzero) digits is 34992000, while the sum is 57.

The spelling of 50666666565 in words is "fifty billion, six hundred sixty-six million, six hundred sixty-six thousand, five hundred sixty-five".