11986664 has 8 divisors (see below), whose sum is σ = 22475010. Its totient is φ = 5993328.

The previous prime is 11986661. The next prime is 11986669. The reversal of 11986664 is 46668911.

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 28900 = 3458^2 + 170^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×11986664² = 287360227697792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11986661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749159 + ... + 749174.

Almost surely, 2^11986664 is an apocalyptic number.

It is an amenable number.

11986664 is a deficient number, since it is larger than the sum of its proper divisors (10488346).

11986664 is a wasteful number, since it uses less digits than its factorization.

11986664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498339 (or 1498335 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 11986664 is about 3462.1761942455. The cubic root of 11986664 is about 228.8580064673.

The spelling of 11986664 in words is "eleven million, nine hundred eighty-six thousand, six hundred sixty-four".