11639966 has 16 divisors (see below), whose sum is σ = 19160064. Its totient is φ = 5270304.

The previous prime is 11639963. The next prime is 11639987. The reversal of 11639966 is 66993611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11639963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2846 + ... + 5601.

It is an arithmetic number, because the mean of its divisors is an integer number (1197504).

Almost surely, 2^11639966 is an apocalyptic number.

11639966 is a deficient number, since it is larger than the sum of its proper divisors (7520098).

11639966 is a wasteful number, since it uses less digits than its factorization.

11639966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8515.

The product of its digits is 52488, while the sum is 41.

The square root of 11639966 is about 3411.7394390545. The cubic root of 11639966 is about 226.6299157064.

The spelling of 11639966 in words is "eleven million, six hundred thirty-nine thousand, nine hundred sixty-six".