16660904 has 16 divisors (see below), whose sum is σ = 33642420. Its totient is φ = 7689600.

The previous prime is 16660879. The next prime is 16660907. The reversal of 16660904 is 40906661.

It can be written as a sum of positive squares in 2 ways, for example, as 13764100 + 2896804 = 3710^2 + 1702^2 .

It is not an unprimeable number, because it can be changed into a prime (16660907) 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, 79997 + ... + 80204.

Almost surely, 2^16660904 is an apocalyptic number.

It is an amenable number.

16660904 is an abundant number, since it is smaller than the sum of its proper divisors (16981516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16660904 is a wasteful number, since it uses less digits than its factorization.

16660904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160220 (or 160216 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 16660904 is about 4081.7770639759. Note that the first 3 decimals coincide. The cubic root of 16660904 is about 255.4070341653.

The spelling of 16660904 in words is "sixteen million, six hundred sixty thousand, nine hundred four".