625566 has 16 divisors (see below), whose sum is σ = 1324944. Its totient is φ = 196224.

The previous prime is 625543. The next prime is 625589. The reversal of 625566 is 665526.

It is an interprime number because it is at equal distance from previous prime (625543) and next prime (625589).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 625566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2965 + ... + 3168.

It is an arithmetic number, because the mean of its divisors is an integer number (82809).

2⁶²⁵⁵⁶⁶ is an apocalyptic number.

625566 is an abundant number, since it is smaller than the sum of its proper divisors (699378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

625566 is a wasteful number, since it uses less digits than its factorization.

625566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6155.

The product of its digits is 10800, while the sum is 30.

The square root of 625566 is about 790.9273038655. The cubic root of 625566 is about 85.5245987838.

The spelling of 625566 in words is "six hundred twenty-five thousand, five hundred sixty-six".