11664738 has 12 divisors (see below), whose sum is σ = 25273638. Its totient is φ = 3888240.

The previous prime is 11664733. The next prime is 11664761. The reversal of 11664738 is 83746611.

11664738 is a `hidden beast` number, since 1 + 1 + 6 + 647 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5890329 + 5774409 = 2427^2 + 2403^2 .

It is a super-2 number, since 2×11664738² = 272132225217288, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11664733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324003 + ... + 324038.

Almost surely, 2^11664738 is an apocalyptic number.

11664738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11664738 is an abundant number, since it is smaller than the sum of its proper divisors (13608900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11664738 is a wasteful number, since it uses less digits than its factorization.

11664738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648049 (or 648046 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 11664738 is about 3415.3679157596. The cubic root of 11664738 is about 226.7905719138.

The spelling of 11664738 in words is "eleven million, six hundred sixty-four thousand, seven hundred thirty-eight".