13664686 has 32 divisors (see below), whose sum is σ = 25205760. Its totient is φ = 5425056.

The previous prime is 13664657. The next prime is 13664711. The reversal of 13664686 is 68646631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11956 + ... + 13048.

It is an arithmetic number, because the mean of its divisors is an integer number (787680).

Almost surely, 2^13664686 is an apocalyptic number.

13664686 is a deficient number, since it is larger than the sum of its proper divisors (11541074).

13664686 is a wasteful number, since it uses less digits than its factorization.

13664686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168.

The product of its digits is 124416, while the sum is 40.

The square root of 13664686 is about 3696.5776063813. The cubic root of 13664686 is about 239.0744794515.

The spelling of 13664686 in words is "thirteen million, six hundred sixty-four thousand, six hundred eighty-six".