622665 has 24 divisors (see below), whose sum is σ = 1097928. Its totient is φ = 326400.

The previous prime is 622663. The next prime is 622669. The reversal of 622665 is 566226.

It can be written as a sum of positive squares in 4 ways, for example, as 233289 + 389376 = 483^2 + 624^2 .

It is not a de Polignac number, because 622665 - 2¹ = 622663 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 2⁸ + 6⁷ + 2⁸ + 6⁷ + 5⁶ .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 622665.

It is not an unprimeable number, because it can be changed into a prime (622663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4477 + ... + 4613.

It is an arithmetic number, because the mean of its divisors is an integer number (45747).

2⁶²²⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

622665 is a deficient number, since it is larger than the sum of its proper divisors (475263).

622665 is a wasteful number, since it uses less digits than its factorization.

622665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 246 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 622665 is about 789.0912494763. The cubic root of 622665 is about 85.3921899594.

The spelling of 622665 in words is "six hundred twenty-two thousand, six hundred sixty-five".