16668772 has 12 divisors (see below), whose sum is σ = 30886380. Its totient is φ = 7844096.

The previous prime is 16668749. The next prime is 16668791. The reversal of 16668772 is 27786661.

It can be written as a sum of positive squares in 2 ways, for example, as 9400356 + 7268416 = 3066^2 + 2696^2 .

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, 122497 + ... + 122632.

It is an arithmetic number, because the mean of its divisors is an integer number (2573865).

Almost surely, 2^16668772 is an apocalyptic number.

It is an amenable number.

16668772 is a deficient number, since it is larger than the sum of its proper divisors (14217608).

16668772 is a wasteful number, since it uses less digits than its factorization.

16668772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245150 (or 245148 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 16668772 is about 4082.7407461165. The cubic root of 16668772 is about 255.4472325903.

The spelling of 16668772 in words is "sixteen million, six hundred sixty-eight thousand, seven hundred seventy-two".