22318220665 has 16 divisors (see below), whose sum is σ = 28849333968. Its totient is φ = 16476961536.

The previous prime is 22318220627. The next prime is 22318220671. The reversal of 22318220665 is 56602281322.

It can be written as a sum of positive squares in 8 ways, for example, as 458302464 + 21859918201 = 21408^2 + 147851^2 .

It is a cyclic number.

It is not a de Polignac number, because 22318220665 - 2¹¹ = 22318218617 is a prime.

It is a super-3 number, since 3×22318220665³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227107 + ... + 310183.

It is an arithmetic number, because the mean of its divisors is an integer number (1803083373).

Almost surely, 2^22318220665 is an apocalyptic number.

It is an amenable number.

22318220665 is a deficient number, since it is larger than the sum of its proper divisors (6531113303).

22318220665 is a wasteful number, since it uses less digits than its factorization.

22318220665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87228.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 22318220665 in words is "twenty-two billion, three hundred eighteen million, two hundred twenty thousand, six hundred sixty-five".