22206440661 has 4 divisors (see below), whose sum is σ = 29608587552. Its totient is φ = 14804293772.

The previous prime is 22206440611. The next prime is 22206440677. The reversal of 22206440661 is 16604460222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22206440661 - 2¹⁰ = 22206439637 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 (22206440611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3701073441 + ... + 3701073446.

It is an arithmetic number, because the mean of its divisors is an integer number (7402146888).

Almost surely, 2^22206440661 is an apocalyptic number.

It is an amenable number.

22206440661 is a deficient number, since it is larger than the sum of its proper divisors (7402146891).

22206440661 is an equidigital number, since it uses as much as digits as its factorization.

22206440661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7402146890.

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 22206440661 in words is "twenty-two billion, two hundred six million, four hundred forty thousand, six hundred sixty-one".