667945738896 has 40 divisors (see below), whose sum is σ = 1726690213920. Its totient is φ = 222498422016.

The previous prime is 667945738883. The next prime is 667945738907. The reversal of 667945738896 is 698837549766.

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, 4620501 + ... + 4762868.

It is an arithmetic number, because the mean of its divisors is an integer number (43167255348).

Almost surely, 2^667945738896 is an apocalyptic number.

It is an amenable number.

667945738896 is an abundant number, since it is smaller than the sum of its proper divisors (1058744475024).

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

667945738896 is a wasteful number, since it uses less digits than its factorization.

667945738896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9384863 (or 9384857 counting only the distinct ones).

The product of its digits is 3292047360, while the sum is 78.

The spelling of 667945738896 in words is "six hundred sixty-seven billion, nine hundred forty-five million, seven hundred thirty-eight thousand, eight hundred ninety-six".