664063770 has 16 divisors (see below), whose sum is σ = 1593753120. Its totient is φ = 177083664.

The previous prime is 664063739. The next prime is 664063811. The reversal of 664063770 is 77360466.

It is a super-2 number, since 2×664063770² = 881961381253225800, which contains 22 as substring.

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, 11067700 + ... + 11067759.

It is an arithmetic number, because the mean of its divisors is an integer number (99609570).

Almost surely, 2^664063770 is an apocalyptic number.

664063770 is an abundant number, since it is smaller than the sum of its proper divisors (929689350).

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

664063770 is a wasteful number, since it uses less digits than its factorization.

664063770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22135469.

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 664063770 is about 25769.4348017181. The cubic root of 664063770 is about 872.4420620362.

The spelling of 664063770 in words is "six hundred sixty-four million, sixty-three thousand, seven hundred seventy".