266864872 has 24 divisors (see below), whose sum is σ = 511278210. Its totient is φ = 130584800.

The previous prime is 266864839. The next prime is 266864879. The reversal of 266864872 is 278468662.

It can be written as a sum of positive squares in only one way, i.e., 258373476 + 8491396 = 16074^2 + 2914^2 .

It is not an unprimeable number, because it can be changed into a prime (266864879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10122 + ... + 25222.

Almost surely, 2^266864872 is an apocalyptic number.

It is an amenable number.

266864872 is a deficient number, since it is larger than the sum of its proper divisors (244413338).

266864872 is a wasteful number, since it uses less digits than its factorization.

266864872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15201 (or 15150 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 49.

The square root of 266864872 is about 16335.9992654260. Note that the first 3 decimals coincide. The cubic root of 266864872 is about 643.8190211978.

The spelling of 266864872 in words is "two hundred sixty-six million, eight hundred sixty-four thousand, eight hundred seventy-two".