22005408356661 has 4 divisors (see below), whose sum is σ = 29340544475552. Its totient is φ = 14670272237772.

The previous prime is 22005408356639. The next prime is 22005408356749. The reversal of 22005408356661 is 16665380450022.

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 not a de Polignac number, because 22005408356661 - 2⁶ = 22005408356597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22005408356661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22005408356161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3667568059441 + ... + 3667568059446.

It is an arithmetic number, because the mean of its divisors is an integer number (7335136118888).

Almost surely, 2^{22005408356661} is an apocalyptic number.

It is an amenable number.

22005408356661 is a deficient number, since it is larger than the sum of its proper divisors (7335136118891).

22005408356661 is an equidigital number, since it uses as much as digits as its factorization.

22005408356661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335136118890.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 22005408356661 in words is "twenty-two trillion, five billion, four hundred eight million, three hundred fifty-six thousand, six hundred sixty-one".