625666 has 8 divisors (see below), whose sum is σ = 942480. Its totient is φ = 311508.

The previous prime is 625663. The next prime is 625697. The reversal of 625666 is 666526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (625661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (117810).

2⁶²⁵⁶⁶⁶ is an apocalyptic number.

625666 is a deficient number, since it is larger than the sum of its proper divisors (316814).

625666 is a wasteful number, since it uses less digits than its factorization.

625666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328.

The product of its digits is 12960, while the sum is 31.

The square root of 625666 is about 790.9905182744. The cubic root of 625666 is about 85.5291557259.

The spelling of 625666 in words is "six hundred twenty-five thousand, six hundred sixty-six".