266891990704 has 40 divisors (see below), whose sum is σ = 520015123152. Its totient is φ = 132696288000.

The previous prime is 266891990693. The next prime is 266891990741. The reversal of 266891990704 is 407099198662.

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, 2407602 + ... + 2516014.

Almost surely, 2^266891990704 is an apocalyptic number.

It is an amenable number.

266891990704 is a deficient number, since it is larger than the sum of its proper divisors (253123132448).

266891990704 is a wasteful number, since it uses less digits than its factorization.

266891990704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109285 (or 109279 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 266891990704 in words is "two hundred sixty-six billion, eight hundred ninety-one million, nine hundred ninety thousand, seven hundred four".