650622664 has 8 divisors (see below), whose sum is σ = 1219917510. Its totient is φ = 325311328.

The previous prime is 650622659. The next prime is 650622683. The reversal of 650622664 is 466226056.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 405700164 + 244922500 = 20142^2 + 15650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40663909 + ... + 40663924.

Almost surely, 2^650622664 is an apocalyptic number.

It is an amenable number.

650622664 is a deficient number, since it is larger than the sum of its proper divisors (569294846).

650622664 is a wasteful number, since it uses less digits than its factorization.

650622664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81327839 (or 81327835 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 650622664 is about 25507.3060906086. The cubic root of 650622664 is about 866.5156200933.

The spelling of 650622664 in words is "six hundred fifty million, six hundred twenty-two thousand, six hundred sixty-four".