222626661 has 16 divisors (see below), whose sum is σ = 303436800. Its totient is φ = 145153008.

The previous prime is 222626641. The next prime is 222626687. The reversal of 222626661 is 166626222.

It is not a de Polignac number, because 222626661 - 2¹⁴ = 222610277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222626641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20970 + ... + 29748.

It is an arithmetic number, because the mean of its divisors is an integer number (18964800).

Almost surely, 2^222626661 is an apocalyptic number.

It is an amenable number.

222626661 is a deficient number, since it is larger than the sum of its proper divisors (80810139).

222626661 is a wasteful number, since it uses less digits than its factorization.

222626661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8968.

The product of its digits is 20736, while the sum is 33.

The square root of 222626661 is about 14920.6789724865. The cubic root of 222626661 is about 606.0740985975.

The spelling of 222626661 in words is "two hundred twenty-two million, six hundred twenty-six thousand, six hundred sixty-one".