11665664 has 18 divisors (see below), whose sum is σ = 23286270. Its totient is φ = 5832704.

The previous prime is 11665663. The next prime is 11665679. The reversal of 11665664 is 46656611.

It can be written as a sum of positive squares in only one way, i.e., 11505664 + 160000 = 3392^2 + 400^2 .

It is not an unprimeable number, because it can be changed into a prime (11665663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22529 + ... + 23040.

Almost surely, 2^11665664 is an apocalyptic number.

It is an amenable number.

11665664 is a deficient number, since it is larger than the sum of its proper divisors (11620606).

11665664 is an frugal number, since it uses more digits than its factorization.

11665664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45585 (or 45571 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 11665664 is about 3415.5034767952. The cubic root of 11665664 is about 226.7965729777.

The spelling of 11665664 in words is "eleven million, six hundred sixty-five thousand, six hundred sixty-four".