11999664 has 100 divisors (see below), whose sum is σ = 35649504. Its totient is φ = 3894912.

The previous prime is 11999657. The next prime is 11999681. The reversal of 11999664 is 46699911.

11999664 is nontrivially palindromic in base 11.

11999664 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11999664² = 287983872225792, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 60814 + ... + 61010.

Almost surely, 2^11999664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11999664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17824752).

11999664 is an abundant number, since it is smaller than the sum of its proper divisors (23649840).

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

11999664 is a wasteful number, since it uses less digits than its factorization.

11999664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 249 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 11999664 is about 3464.0531173757. The cubic root of 11999664 is about 228.9407116908.

The spelling of 11999664 in words is "eleven million, nine hundred ninety-nine thousand, six hundred sixty-four".