5660646665 has 16 divisors (see below), whose sum is σ = 6893563536. Its totient is φ = 4461465600.

The previous prime is 5660646653. The next prime is 5660646697. The reversal of 5660646665 is 5666460665.

It can be written as a sum of positive squares in 8 ways, for example, as 3952144 + 5656694521 = 1988^2 + 75211^2 .

It is not a de Polignac number, because 5660646665 - 2⁶ = 5660646601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335225 + ... + 351705.

It is an arithmetic number, because the mean of its divisors is an integer number (430847721).

Almost surely, 2^5660646665 is an apocalyptic number.

It is an amenable number.

5660646665 is a deficient number, since it is larger than the sum of its proper divisors (1232916871).

5660646665 is a wasteful number, since it uses less digits than its factorization.

5660646665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17500.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The square root of 5660646665 is about 75237.2691224236. The cubic root of 5660646665 is about 1782.1955260101.

The spelling of 5660646665 in words is "five billion, six hundred sixty million, six hundred forty-six thousand, six hundred sixty-five".