11666680 has 32 divisors (see below), whose sum is σ = 26373600. Its totient is φ = 4644736.

The previous prime is 11666663. The next prime is 11666689. The reversal of 11666680 is 8666611.

It is a super-2 number, since 2×11666680² = 272222844444800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9966 + ... + 11074.

It is an arithmetic number, because the mean of its divisors is an integer number (824175).

Almost surely, 2^11666680 is an apocalyptic number.

11666680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11666680 is an abundant number, since it is smaller than the sum of its proper divisors (14706920).

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

11666680 is a wasteful number, since it uses less digits than its factorization.

11666680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 11666680 is about 3415.6522071195. The cubic root of 11666680 is about 226.8031569329.

It can be divided in two parts, 1 and 1666680, that added together give a square (1666681 = 1291²).

The spelling of 11666680 in words is "eleven million, six hundred sixty-six thousand, six hundred eighty".