16648907 has 4 divisors (see below), whose sum is σ = 18162456. Its totient is φ = 15135360.

The previous prime is 16648901. The next prime is 16648909. The reversal of 16648907 is 70984661.

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

It is a cyclic number.

It is not a de Polignac number, because 16648907 - 2⁶ = 16648843 is a prime.

It is a super-2 number, since 2×16648907² = 554372208589298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16648901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756758 + ... + 756779.

It is an arithmetic number, because the mean of its divisors is an integer number (4540614).

Almost surely, 2^16648907 is an apocalyptic number.

16648907 is a deficient number, since it is larger than the sum of its proper divisors (1513549).

16648907 is a wasteful number, since it uses less digits than its factorization.

16648907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513548.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 16648907 is about 4080.3072188256. The cubic root of 16648907 is about 255.3457158851.

The spelling of 16648907 in words is "sixteen million, six hundred forty-eight thousand, nine hundred seven".