667646674774 has 16 divisors (see below), whose sum is σ = 1002086254080. Its totient is φ = 333617993280.

The previous prime is 667646674757. The next prime is 667646674819. The reversal of 667646674774 is 477476646766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23804139 + ... + 23832169.

It is an arithmetic number, because the mean of its divisors is an integer number (62630390880).

Almost surely, 2^667646674774 is an apocalyptic number.

667646674774 is a deficient number, since it is larger than the sum of its proper divisors (334439579306).

667646674774 is a wasteful number, since it uses less digits than its factorization.

667646674774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34935.

The product of its digits is 1194891264, while the sum is 70.

The spelling of 667646674774 in words is "six hundred sixty-seven billion, six hundred forty-six million, six hundred seventy-four thousand, seven hundred seventy-four".