662866138 has 16 divisors (see below), whose sum is σ = 1102474080. Its totient is φ = 296362800.

The previous prime is 662866117. The next prime is 662866163. The reversal of 662866138 is 831668266.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 245628 + ... + 248311.

It is an arithmetic number, because the mean of its divisors is an integer number (68904630).

Almost surely, 2^662866138 is an apocalyptic number.

662866138 is a deficient number, since it is larger than the sum of its proper divisors (439607942).

662866138 is a wasteful number, since it uses less digits than its factorization.

662866138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494013.

The product of its digits is 497664, while the sum is 46.

The square root of 662866138 is about 25746.1868633007. The cubic root of 662866138 is about 871.9172664051.

The spelling of 662866138 in words is "six hundred sixty-two million, eight hundred sixty-six thousand, one hundred thirty-eight".