66221466630 has 64 divisors (see below), whose sum is σ = 183578669568. Its totient is φ = 15109352960.

The previous prime is 66221466607. The next prime is 66221466673. The reversal of 66221466630 is 3666412266.

66221466630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5896482 + ... + 5907701.

It is an arithmetic number, because the mean of its divisors is an integer number (2868416712).

Almost surely, 2^66221466630 is an apocalyptic number.

66221466630 is an abundant number, since it is smaller than the sum of its proper divisors (117357202938).

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

66221466630 is a wasteful number, since it uses less digits than its factorization.

66221466630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11804221.

The product of its (nonzero) digits is 373248, while the sum is 42.

Adding to 66221466630 its reverse (3666412266), we get a palindrome (69887878896).

The spelling of 66221466630 in words is "sixty-six billion, two hundred twenty-one million, four hundred sixty-six thousand, six hundred thirty".