16664458 has 8 divisors (see below), whose sum is σ = 25164900. Its totient is φ = 8276160.

The previous prime is 16664447. The next prime is 16664477. The reversal of 16664458 is 85446661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16459249 + 205209 = 4057^2 + 453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16664458.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27663 + ... + 28258.

Almost surely, 2^16664458 is an apocalyptic number.

16664458 is a deficient number, since it is larger than the sum of its proper divisors (8500442).

16664458 is a wasteful number, since it uses less digits than its factorization.

16664458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56072.

The product of its digits is 138240, while the sum is 40.

The square root of 16664458 is about 4082.2123903589. The cubic root of 16664458 is about 255.4251934854.

The spelling of 16664458 in words is "sixteen million, six hundred sixty-four thousand, four hundred fifty-eight".