626660 has 12 divisors (see below), whose sum is σ = 1316028. Its totient is φ = 250656.

The previous prime is 626629. The next prime is 626663. The reversal of 626660 is 66626.

It can be written as a sum of positive squares in 2 ways, for example, as 495616 + 131044 = 704^2 + 362^2 .

It is not an unprimeable number, because it can be changed into a prime (626663) by changing a digit.

626660 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 15647 + ... + 15686.

It is an arithmetic number, because the mean of its divisors is an integer number (109669).

2⁶²⁶⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

626660 is an abundant number, since it is smaller than the sum of its proper divisors (689368).

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

626660 is a wasteful number, since it uses less digits than its factorization.

626660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31342 (or 31340 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 626660 is about 791.6185950317. The cubic root of 626660 is about 85.5744253525.

The spelling of 626660 in words is "six hundred twenty-six thousand, six hundred sixty".