16618772 has 12 divisors (see below), whose sum is σ = 29869140. Its totient is φ = 8084736.

The previous prime is 16618751. The next prime is 16618799. The reversal of 16618772 is 27781661.

It can be written as a sum of positive squares in 2 ways, for example, as 16032016 + 586756 = 4004^2 + 766^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55997 + ... + 56292.

It is an arithmetic number, because the mean of its divisors is an integer number (2489095).

Almost surely, 2^16618772 is an apocalyptic number.

It is an amenable number.

16618772 is a deficient number, since it is larger than the sum of its proper divisors (13250368).

16618772 is a wasteful number, since it uses less digits than its factorization.

16618772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112330 (or 112328 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 16618772 is about 4076.6128096742. The cubic root of 16618772 is about 255.1915618126.

The spelling of 16618772 in words is "sixteen million, six hundred eighteen thousand, seven hundred seventy-two".