66221106 has 16 divisors (see below), whose sum is σ = 151362624. Its totient is φ = 18920304.

The previous prime is 66221101. The next prime is 66221107. The reversal of 66221106 is 60112266.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66221101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 788305 + ... + 788388.

It is an arithmetic number, because the mean of its divisors is an integer number (9460164).

Almost surely, 2^66221106 is an apocalyptic number.

66221106 is an abundant number, since it is smaller than the sum of its proper divisors (85141518).

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

66221106 is a wasteful number, since it uses less digits than its factorization.

66221106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576705.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 66221106 is about 8137.6351601678. The cubic root of 66221106 is about 404.5747830990.

The spelling of 66221106 in words is "sixty-six million, two hundred twenty-one thousand, one hundred six".