625668 has 24 divisors (see below), whose sum is σ = 1546272. Its totient is φ = 196224.

The previous prime is 625663. The next prime is 625697. The reversal of 625668 is 866526.

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

625668 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330 + ... + 1737.

It is an arithmetic number, because the mean of its divisors is an integer number (64428).

2⁶²⁵⁶⁶⁸ is an apocalyptic number.

625668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

625668 is an abundant number, since it is smaller than the sum of its proper divisors (920604).

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

625668 is a wasteful number, since it uses less digits than its factorization.

625668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091 (or 3089 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 625668 is about 790.9917825110. The cubic root of 625668 is about 85.5292468598.

The spelling of 625668 in words is "six hundred twenty-five thousand, six hundred sixty-eight".