27222621666 has 16 divisors (see below), whose sum is σ = 56201541888. Its totient is φ = 8781490800.

The previous prime is 27222621563. The next prime is 27222621667. The reversal of 27222621666 is 66612622272.

It is a super-2 number, since 2×27222621666² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27222621667) 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, 73178905 + ... + 73179276.

It is an arithmetic number, because the mean of its divisors is an integer number (3512596368).

Almost surely, 2^27222621666 is an apocalyptic number.

27222621666 is an abundant number, since it is smaller than the sum of its proper divisors (28978920222).

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

27222621666 is a wasteful number, since it uses less digits than its factorization.

27222621666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146358217.

The product of its digits is 290304, while the sum is 42.

The spelling of 27222621666 in words is "twenty-seven billion, two hundred twenty-two million, six hundred twenty-one thousand, six hundred sixty-six".