506166565994 has 32 divisors (see below), whose sum is σ = 806765216400. Its totient is φ = 237351813120.

The previous prime is 506166565991. The next prime is 506166566029. The reversal of 506166565994 is 499565661605.

It can be written as a sum of positive squares in 8 ways, for example, as 391168939225 + 114997626769 = 625435^2 + 339113^2 .

It is not an unprimeable number, because it can be changed into a prime (506166565991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12899084 + ... + 12938264.

Almost surely, 2^506166565994 is an apocalyptic number.

506166565994 is a deficient number, since it is larger than the sum of its proper divisors (300598650406).

506166565994 is a wasteful number, since it uses less digits than its factorization.

506166565994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40538.

The product of its (nonzero) digits is 52488000, while the sum is 62.

The spelling of 506166565994 in words is "five hundred six billion, one hundred sixty-six million, five hundred sixty-five thousand, nine hundred ninety-four".