5642008665 has 16 divisors (see below), whose sum is σ = 9093109248. Its totient is φ = 2987106176.

The previous prime is 5642008643. The next prime is 5642008693. The reversal of 5642008665 is 5668002465.

It is a cyclic number.

It is not a de Polignac number, because 5642008665 - 2⁵ = 5642008633 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1370697 + ... + 1374806.

It is an arithmetic number, because the mean of its divisors is an integer number (568319328).

Almost surely, 2^5642008665 is an apocalyptic number.

It is an amenable number.

5642008665 is a deficient number, since it is larger than the sum of its proper divisors (3451100583).

5642008665 is a wasteful number, since it uses less digits than its factorization.

5642008665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745648.

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 5642008665 is about 75113.3055124057. The cubic root of 5642008665 is about 1780.2373820726.

The spelling of 5642008665 in words is "five billion, six hundred forty-two million, eight thousand, six hundred sixty-five".