66221454 has 16 divisors (see below), whose sum is σ = 142630992. Its totient is φ = 20375808.

The previous prime is 66221399. The next prime is 66221497. The reversal of 66221454 is 45412266.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424419 + ... + 424574.

It is an arithmetic number, because the mean of its divisors is an integer number (8914437).

Almost surely, 2^66221454 is an apocalyptic number.

66221454 is an abundant number, since it is smaller than the sum of its proper divisors (76409538).

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

66221454 is a wasteful number, since it uses less digits than its factorization.

66221454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849011.

The product of its digits is 11520, while the sum is 30.

The square root of 66221454 is about 8137.6565422731. The cubic root of 66221454 is about 404.5754917944.

The spelling of 66221454 in words is "sixty-six million, two hundred twenty-one thousand, four hundred fifty-four".