266247970506 has 24 divisors (see below), whose sum is σ = 659280689184. Its totient is φ = 76070848680.

The previous prime is 266247970421. The next prime is 266247970511. The reversal of 266247970506 is 605079742662.

266247970506 is a `hidden beast` number, since 2 + 6 + 6 + 2 + 47 + 97 + 0 + 506 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1056539440 + ... + 1056539691.

It is an arithmetic number, because the mean of its divisors is an integer number (27470028716).

Almost surely, 2^266247970506 is an apocalyptic number.

266247970506 is an abundant number, since it is smaller than the sum of its proper divisors (393032718678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266247970506 is a wasteful number, since it uses less digits than its factorization.

266247970506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113079146 (or 2113079143 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 266247970506 in words is "two hundred sixty-six billion, two hundred forty-seven million, nine hundred seventy thousand, five hundred six".