456640665 has 16 divisors (see below), whose sum is σ = 786827328. Its totient is φ = 224807616.

The previous prime is 456640609. The next prime is 456640687. The reversal of 456640665 is 566046654.

It is a happy number.

It is not a de Polignac number, because 456640665 - 2⁶ = 456640601 is a prime.

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, 1170679 + ... + 1171068.

It is an arithmetic number, because the mean of its divisors is an integer number (49176708).

Almost surely, 2^456640665 is an apocalyptic number.

It is an amenable number.

456640665 is a deficient number, since it is larger than the sum of its proper divisors (330186663).

456640665 is a wasteful number, since it uses less digits than its factorization.

456640665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341768.

The product of its (nonzero) digits is 518400, while the sum is 42.

The square root of 456640665 is about 21369.1521825270. The cubic root of 456640665 is about 770.0605254048.

The spelling of 456640665 in words is "four hundred fifty-six million, six hundred forty thousand, six hundred sixty-five".