666670666734 has 24 divisors (see below), whose sum is σ = 1468935369720. Its totient is φ = 218457054288.

The previous prime is 666670666709. The next prime is 666670666757. The reversal of 666670666734 is 437666076666.

It is a congruent number.

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, 313874017 + ... + 313876140.

It is an arithmetic number, because the mean of its divisors is an integer number (61205640405).

Almost surely, 2^666670666734 is an apocalyptic number.

666670666734 is an abundant number, since it is smaller than the sum of its proper divisors (802264702986).

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

666670666734 is a wasteful number, since it uses less digits than its factorization.

666670666734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627750224 (or 627750221 counting only the distinct ones).

The product of its (nonzero) digits is 164602368, while the sum is 63.

The spelling of 666670666734 in words is "six hundred sixty-six billion, six hundred seventy million, six hundred sixty-six thousand, seven hundred thirty-four".