11640666 has 16 divisors (see below), whose sum is σ = 23544000. Its totient is φ = 3836448.

The previous prime is 11640649. The next prime is 11640677. The reversal of 11640666 is 66604611.

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, 10366 + ... + 11433.

It is an arithmetic number, because the mean of its divisors is an integer number (1471500).

Almost surely, 2^11640666 is an apocalyptic number.

11640666 is an abundant number, since it is smaller than the sum of its proper divisors (11903334).

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

11640666 is a wasteful number, since it uses less digits than its factorization.

11640666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21893.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 11640666 is about 3411.8420244789. The cubic root of 11640666 is about 226.6344586109.

The spelling of 11640666 in words is "eleven million, six hundred forty thousand, six hundred sixty-six".