667648756324 has 24 divisors (see below), whose sum is σ = 1281007224000. Its totient is φ = 301951694880.

The previous prime is 667648756283. The next prime is 667648756339. The reversal of 667648756324 is 423657846766.

It is a happy 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, 38116459 + ... + 38133970.

It is an arithmetic number, because the mean of its divisors is an integer number (53375301000).

Almost surely, 2^667648756324 is an apocalyptic number.

It is an amenable number.

667648756324 is a deficient number, since it is larger than the sum of its proper divisors (613358467676).

667648756324 is a wasteful number, since it uses less digits than its factorization.

667648756324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76250643 (or 76250641 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 64.

The spelling of 667648756324 in words is "six hundred sixty-seven billion, six hundred forty-eight million, seven hundred fifty-six thousand, three hundred twenty-four".