2656461665 has 32 divisors (see below), whose sum is σ = 3772137600. Its totient is φ = 1770462720.

The previous prime is 2656461617. The next prime is 2656461673. The reversal of 2656461665 is 5661646562.

2656461665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2656461665 - 2¹⁰ = 2656460641 is a prime.

It is a super-2 number, since 2×2656461665² = 14113577155229144450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86021 + ... + 112749.

It is an arithmetic number, because the mean of its divisors is an integer number (117879300).

Almost surely, 2^2656461665 is an apocalyptic number.

It is an amenable number.

2656461665 is a deficient number, since it is larger than the sum of its proper divisors (1115675935).

2656461665 is a wasteful number, since it uses less digits than its factorization.

2656461665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26897.

The product of its digits is 1555200, while the sum is 47.

The square root of 2656461665 is about 51540.8737314377. The cubic root of 2656461665 is about 1384.9513491493.

The spelling of 2656461665 in words is "two billion, six hundred fifty-six million, four hundred sixty-one thousand, six hundred sixty-five".