11663657 has 12 divisors (see below), whose sum is σ = 12333060. Its totient is φ = 11026080.

The previous prime is 11663653. The next prime is 11663669. The reversal of 11663657 is 75636611.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9803161 + 1860496 = 3131^2 + 1364^2 .

It is not a de Polignac number, because 11663657 - 2² = 11663653 is a prime.

It is a super-2 number, since 2×11663657² = 272081789227298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11663653) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 50819 + ... + 51047.

It is an arithmetic number, because the mean of its divisors is an integer number (1027755).

Almost surely, 2^11663657 is an apocalyptic number.

It is an amenable number.

11663657 is a deficient number, since it is larger than the sum of its proper divisors (669403).

11663657 is an equidigital number, since it uses as much as digits as its factorization.

11663657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 313 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 11663657 is about 3415.2096568146. The cubic root of 11663657 is about 226.7835659504.

The spelling of 11663657 in words is "eleven million, six hundred sixty-three thousand, six hundred fifty-seven".