667880647472 has 20 divisors (see below), whose sum is σ = 1304207882496. Its totient is φ = 331310871360.

The previous prime is 667880647471. The next prime is 667880647477. The reversal of 667880647472 is 274746088766.

It is a junction number, because it is equal to n+sod(n) for n = 667880647399 and 667880647408.

It is not an unprimeable number, because it can be changed into a prime (667880647471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164338679 + ... + 164342742.

Almost surely, 2^667880647472 is an apocalyptic number.

It is an amenable number.

667880647472 is a deficient number, since it is larger than the sum of its proper divisors (636327235024).

667880647472 is a wasteful number, since it uses less digits than its factorization.

667880647472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328681556 (or 328681550 counting only the distinct ones).

The product of its (nonzero) digits is 151732224, while the sum is 65.

The spelling of 667880647472 in words is "six hundred sixty-seven billion, eight hundred eighty million, six hundred forty-seven thousand, four hundred seventy-two".