66221458 has 8 divisors (see below), whose sum is σ = 100315980. Its totient is φ = 32782800.

The previous prime is 66221399. The next prime is 66221497. The reversal of 66221458 is 85412266.

It can be written as a sum of positive squares in 2 ways, for example, as 65820769 + 400689 = 8113^2 + 633^2 .

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

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, 163713 + ... + 164116.

Almost surely, 2^66221458 is an apocalyptic number.

66221458 is a deficient number, since it is larger than the sum of its proper divisors (34094522).

66221458 is a wasteful number, since it uses less digits than its factorization.

66221458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327932.

The product of its digits is 23040, while the sum is 34.

The square root of 66221458 is about 8137.6567880441. The cubic root of 66221458 is about 404.5754999403.

The spelling of 66221458 in words is "sixty-six million, two hundred twenty-one thousand, four hundred fifty-eight".