11631665 has 16 divisors (see below), whose sum is σ = 14570496. Its totient is φ = 8904000.

The previous prime is 11631647. The next prime is 11631713. The reversal of 11631665 is 56613611.

11631665 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 11631665 - 2⁸ = 11631409 is a prime.

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, 15284 + ... + 16026.

It is an arithmetic number, because the mean of its divisors is an integer number (910656).

Almost surely, 2^11631665 is an apocalyptic number.

It is an amenable number.

11631665 is a deficient number, since it is larger than the sum of its proper divisors (2938831).

11631665 is a wasteful number, since it uses less digits than its factorization.

11631665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its digits is 3240, while the sum is 29.

The square root of 11631665 is about 3410.5226872138. The cubic root of 11631665 is about 226.5760294576.

The spelling of 11631665 in words is "eleven million, six hundred thirty-one thousand, six hundred sixty-five".