22172626666 has 4 divisors (see below), whose sum is σ = 33258940002. Its totient is φ = 11086313332.

The previous prime is 22172626661. The next prime is 22172626673. The reversal of 22172626666 is 66662627122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18230670441 + 3941956225 = 135021^2 + 62785^2 .

It is not an unprimeable number, because it can be changed into a prime (22172626661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5543156665 + ... + 5543156668.

Almost surely, 2^22172626666 is an apocalyptic number.

22172626666 is a deficient number, since it is larger than the sum of its proper divisors (11086313336).

22172626666 is a wasteful number, since it uses less digits than its factorization.

22172626666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11086313335.

The product of its digits is 870912, while the sum is 46.

The spelling of 22172626666 in words is "twenty-two billion, one hundred seventy-two million, six hundred twenty-six thousand, six hundred sixty-six".