664667716000 has 48 divisors (see below), whose sum is σ = 1633088588040. Its totient is φ = 265867084800.

The previous prime is 664667715989. The next prime is 664667716021. The reversal of 664667716000 is 617766466.

It can be written as a sum of positive squares in 4 ways, for example, as 299257137936 + 365410578064 = 547044^2 + 604492^2 .

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, 83079465 + ... + 83087464.

Almost surely, 2^664667716000 is an apocalyptic number.

It is an amenable number.

664667716000 is an abundant number, since it is smaller than the sum of its proper divisors (968420872040).

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

664667716000 is a wasteful number, since it uses less digits than its factorization.

664667716000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166166954 (or 166166936 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 664667716000 in words is "six hundred sixty-four billion, six hundred sixty-seven million, seven hundred sixteen thousand".