13664698 has 4 divisors (see below), whose sum is σ = 20497050. Its totient is φ = 6832348.

The previous prime is 13664657. The next prime is 13664711. The reversal of 13664698 is 89646631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12159169 + 1505529 = 3487^2 + 1227^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3416173 + ... + 3416176.

Almost surely, 2^13664698 is an apocalyptic number.

13664698 is a deficient number, since it is larger than the sum of its proper divisors (6832352).

13664698 is an equidigital number, since it uses as much as digits as its factorization.

13664698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832351.

The product of its digits is 186624, while the sum is 43.

The square root of 13664698 is about 3696.5792295039. The cubic root of 13664698 is about 239.0745494347.

The spelling of 13664698 in words is "thirteen million, six hundred sixty-four thousand, six hundred ninety-eight".