16666722 has 20 divisors (see below), whose sum is σ = 37346166. Its totient is φ = 5555520.

The previous prime is 16666711. The next prime is 16666799. The reversal of 16666722 is 22766661.

16666722 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11148921 + 5517801 = 3339^2 + 2349^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 51279 + ... + 51602.

Almost surely, 2^16666722 is an apocalyptic number.

16666722 is an abundant number, since it is smaller than the sum of its proper divisors (20679444).

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

16666722 is a wasteful number, since it uses less digits than its factorization.

16666722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102895 (or 102886 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 16666722 is about 4082.4896815546. The cubic root of 16666722 is about 255.4367601472.

The spelling of 16666722 in words is "sixteen million, six hundred sixty-six thousand, seven hundred twenty-two".