623222665 has 16 divisors (see below), whose sum is σ = 818603856. Its totient is φ = 452678400.

The previous prime is 623222659. The next prime is 623222683. The reversal of 623222665 is 566222326.

623222665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 41641209 + 581581456 = 6453^2 + 24116^2 .

It is not a de Polignac number, because 623222665 - 2³ = 623222657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623222665.

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, 74626 + ... + 82555.

It is an arithmetic number, because the mean of its divisors is an integer number (51162741).

Almost surely, 2^623222665 is an apocalyptic number.

623222665 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

623222665 is a deficient number, since it is larger than the sum of its proper divisors (195381191).

623222665 is a wasteful number, since it uses less digits than its factorization.

623222665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157260.

The product of its digits is 51840, while the sum is 34.

The square root of 623222665 is about 24964.4279926459. The cubic root of 623222665 is about 854.1767505241.

The spelling of 623222665 in words is "six hundred twenty-three million, two hundred twenty-two thousand, six hundred sixty-five".