667728117448 has 32 divisors (see below), whose sum is σ = 1434260923200. Its totient is φ = 285486201792.

The previous prime is 667728117443. The next prime is 667728117467. The reversal of 667728117448 is 844711827766.

It is not an unprimeable number, because it can be changed into a prime (667728117443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14205315 + ... + 14252242.

It is an arithmetic number, because the mean of its divisors is an integer number (44820653850).

Almost surely, 2^667728117448 is an apocalyptic number.

It is an amenable number.

667728117448 is an abundant number, since it is smaller than the sum of its proper divisors (766532805752).

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

667728117448 is a wasteful number, since it uses less digits than its factorization.

667728117448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28457989 (or 28457985 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 61.

The spelling of 667728117448 in words is "six hundred sixty-seven billion, seven hundred twenty-eight million, one hundred seventeen thousand, four hundred forty-eight".