66221562 has 32 divisors (see below), whose sum is σ = 152985024. Its totient is φ = 18886400.

The previous prime is 66221537. The next prime is 66221567. The reversal of 66221562 is 26512266.

It is not an unprimeable number, because it can be changed into a prime (66221567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28389 + ... + 30632.

It is an arithmetic number, because the mean of its divisors is an integer number (4780782).

Almost surely, 2^66221562 is an apocalyptic number.

66221562 is an abundant number, since it is smaller than the sum of its proper divisors (86763462).

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

66221562 is a wasteful number, since it uses less digits than its factorization.

66221562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59054.

The product of its digits is 8640, while the sum is 30.

The square root of 66221562 is about 8137.6631780874. The cubic root of 66221562 is about 404.5757117338.

The spelling of 66221562 in words is "sixty-six million, two hundred twenty-one thousand, five hundred sixty-two".