16663913 has 8 divisors (see below), whose sum is σ = 19313280. Its totient is φ = 14081760.

The previous prime is 16663883. The next prime is 16663963. The reversal of 16663913 is 31936661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16663913 - 2⁶ = 16663849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16663963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16268 + ... + 17261.

It is an arithmetic number, because the mean of its divisors is an integer number (2414160).

Almost surely, 2^16663913 is an apocalyptic number.

It is an amenable number.

16663913 is a deficient number, since it is larger than the sum of its proper divisors (2649367).

16663913 is an equidigital number, since it uses as much as digits as its factorization.

16663913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33607.

The product of its digits is 17496, while the sum is 35.

The square root of 16663913 is about 4082.1456367945. The cubic root of 16663913 is about 255.4224089514.

It can be divided in two parts, 16663 and 913, that added together give a cube (17576 = 26³).

The spelling of 16663913 in words is "sixteen million, six hundred sixty-three thousand, nine hundred thirteen".