664486550 has 144 divisors (see below), whose sum is σ = 1600647552. Its totient is φ = 203212800.

The previous prime is 664486513. The next prime is 664486561. The reversal of 664486550 is 55684466.

664486550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 987014 + ... + 987686.

It is an arithmetic number, because the mean of its divisors is an integer number (11115608).

Almost surely, 2^664486550 is an apocalyptic number.

664486550 is an abundant number, since it is smaller than the sum of its proper divisors (936161002).

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

664486550 is a wasteful number, since it uses less digits than its factorization.

664486550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 731 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The square root of 664486550 is about 25777.6366255714. The cubic root of 664486550 is about 872.6271711689.

The spelling of 664486550 in words is "six hundred sixty-four million, four hundred eighty-six thousand, five hundred fifty".