667407474738 has 24 divisors (see below), whose sum is σ = 1466416426176. Its totient is φ = 219335789400.

The previous prime is 667407474733. The next prime is 667407474751. The reversal of 667407474738 is 837474704766.

667407474738 is a `hidden beast` number, since 66 + 74 + 0 + 7 + 474 + 7 + 38 = 666.

It is not an unprimeable number, because it can be changed into a prime (667407474733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261112758 + ... + 261115313.

It is an arithmetic number, because the mean of its divisors is an integer number (61100684424).

Almost surely, 2^667407474738 is an apocalyptic number.

667407474738 is an abundant number, since it is smaller than the sum of its proper divisors (799008951438).

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

667407474738 is a wasteful number, since it uses less digits than its factorization.

667407474738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522228150 (or 522228147 counting only the distinct ones).

The product of its (nonzero) digits is 132765696, while the sum is 63.

The spelling of 667407474738 in words is "six hundred sixty-seven billion, four hundred seven million, four hundred seventy-four thousand, seven hundred thirty-eight".