666862136 has 16 divisors (see below), whose sum is σ = 1250818800. Its totient is φ = 333310464.

The previous prime is 666862127. The next prime is 666862151. The reversal of 666862136 is 631268666.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11096 + ... + 38168.

It is an arithmetic number, because the mean of its divisors is an integer number (78176175).

Almost surely, 2^666862136 is an apocalyptic number.

It is an amenable number.

666862136 is a deficient number, since it is larger than the sum of its proper divisors (583956664).

666862136 is a wasteful number, since it uses less digits than its factorization.

666862136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30158 (or 30154 counting only the distinct ones).

The product of its digits is 373248, while the sum is 44.

The square root of 666862136 is about 25823.6739446578. The cubic root of 666862136 is about 873.6658354887.

The spelling of 666862136 in words is "six hundred sixty-six million, eight hundred sixty-two thousand, one hundred thirty-six".