3640966664 has 16 divisors (see below), whose sum is σ = 6829763820. Its totient is φ = 1819696320.

The previous prime is 3640966639. The next prime is 3640966711. The reversal of 3640966664 is 4666690463.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3622836100 + 18130564 = 60190^2 + 4258^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78479 + ... + 115934.

Almost surely, 2^3640966664 is an apocalyptic number.

It is an amenable number.

3640966664 is a deficient number, since it is larger than the sum of its proper divisors (3188797156).

3640966664 is a wasteful number, since it uses less digits than its factorization.

3640966664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196760 (or 196756 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 50.

The square root of 3640966664 is about 60340.4231340815. The cubic root of 3640966664 is about 1538.4104957942.

The spelling of 3640966664 in words is "three billion, six hundred forty million, nine hundred sixty-six thousand, six hundred sixty-four".