11665990 has 16 divisors (see below), whose sum is σ = 23998752. Its totient is φ = 3999744.

The previous prime is 11665963. The next prime is 11666021. The reversal of 11665990 is 9956611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83259 + ... + 83398.

It is an arithmetic number, because the mean of its divisors is an integer number (1499922).

Almost surely, 2^11665990 is an apocalyptic number.

11665990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11665990 is an abundant number, since it is smaller than the sum of its proper divisors (12332762).

11665990 is a wasteful number, since it uses less digits than its factorization.

11665990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166671.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 11665990 is about 3415.5512000261. The cubic root of 11665990 is about 226.7986855876.

The spelling of 11665990 in words is "eleven million, six hundred sixty-five thousand, nine hundred ninety".