66221867862 has 12 divisors (see below), whose sum is σ = 143480713740. Its totient is φ = 22073955948.

The previous prime is 66221867857. The next prime is 66221867863. The reversal of 66221867862 is 26876812266.

66221867862 is a `hidden beast` number, since 6 + 622 + 1 + 8 + 6 + 7 + 8 + 6 + 2 = 666.

66221867862 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66221867799 and 66221867808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66221867863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1839496312 + ... + 1839496347.

It is an arithmetic number, because the mean of its divisors is an integer number (11956726145).

Almost surely, 2^66221867862 is an apocalyptic number.

66221867862 is an abundant number, since it is smaller than the sum of its proper divisors (77258845878).

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

66221867862 is a wasteful number, since it uses less digits than its factorization.

66221867862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678992667 (or 3678992664 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 66221867862 in words is "sixty-six billion, two hundred twenty-one million, eight hundred sixty-seven thousand, eight hundred sixty-two".