664581416952 has 16 divisors (see below), whose sum is σ = 1661453542440. Its totient is φ = 221527138976.

The previous prime is 664581416951. The next prime is 664581417041. The reversal of 664581416952 is 259614185466.

It is a junction number, because it is equal to n+sod(n) for n = 664581416892 and 664581416901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664581416951) 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, 13845446163 + ... + 13845446210.

Almost surely, 2^664581416952 is an apocalyptic number.

It is an amenable number.

664581416952 is an abundant number, since it is smaller than the sum of its proper divisors (996872125488).

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

664581416952 is a wasteful number, since it uses less digits than its factorization.

664581416952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27690892382 (or 27690892378 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 57.

The spelling of 664581416952 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred sixteen thousand, nine hundred fifty-two".