16660408 has 16 divisors (see below), whose sum is σ = 33076080. Its totient is φ = 7840128.

The previous prime is 16660403. The next prime is 16660417. The reversal of 16660408 is 80406661.

It is a self number, because there is not a number n which added to its sum of digits gives 16660408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660403) 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, 61116 + ... + 61387.

It is an arithmetic number, because the mean of its divisors is an integer number (2067255).

Almost surely, 2^16660408 is an apocalyptic number.

It is an amenable number.

16660408 is a deficient number, since it is larger than the sum of its proper divisors (16415672).

16660408 is a wasteful number, since it uses less digits than its factorization.

16660408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122526 (or 122522 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 16660408 is about 4081.7163056734. The cubic root of 16660408 is about 255.4044996261.

The spelling of 16660408 in words is "sixteen million, six hundred sixty thousand, four hundred eight".