2656003665 has 16 divisors (see below), whose sum is σ = 4856692608. Its totient is φ = 1214173056.

The previous prime is 2656003639. The next prime is 2656003741. The reversal of 2656003665 is 5663006562.

It is not a de Polignac number, because 2656003665 - 2¹⁰ = 2656002641 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12647532 + ... + 12647741.

It is an arithmetic number, because the mean of its divisors is an integer number (303543288).

Almost surely, 2^2656003665 is an apocalyptic number.

It is an amenable number.

2656003665 is a deficient number, since it is larger than the sum of its proper divisors (2200688943).

2656003665 is a wasteful number, since it uses less digits than its factorization.

2656003665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25295288.

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 2656003665 is about 51536.4304642842. The cubic root of 2656003665 is about 1384.8717515172.

The spelling of 2656003665 in words is "two billion, six hundred fifty-six million, three thousand, six hundred sixty-five".