667648553684 has 24 divisors (see below), whose sum is σ = 1335381609408. Its totient is φ = 286116986880.

The previous prime is 667648553639. The next prime is 667648553707. The reversal of 667648553684 is 486355846766.

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, 299309 + ... + 1193684.

It is an arithmetic number, because the mean of its divisors is an integer number (55640900392).

Almost surely, 2^667648553684 is an apocalyptic number.

It is an amenable number.

667648553684 is an abundant number, since it is smaller than the sum of its proper divisors (667733055724).

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

667648553684 is a wasteful number, since it uses less digits than its factorization.

667648553684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508975 (or 1508973 counting only the distinct ones).

The product of its digits is 696729600, while the sum is 68.

The spelling of 667648553684 in words is "six hundred sixty-seven billion, six hundred forty-eight million, five hundred fifty-three thousand, six hundred eighty-four".