626664025 has 24 divisors (see below), whose sum is σ = 839979224. Its totient is φ = 461030400.

The previous prime is 626663959. The next prime is 626664029. The reversal of 626664025 is 520466626.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 296115264 + 330548761 = 17208^2 + 18181^2 .

It is not a de Polignac number, because 626664025 - 2¹¹ = 626661977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (626664029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86545 + ... + 93505.

Almost surely, 2^626664025 is an apocalyptic number.

626664025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

626664025 is a deficient number, since it is larger than the sum of its proper divisors (213315199).

626664025 is a wasteful number, since it uses less digits than its factorization.

626664025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7261 (or 7256 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 626664025 is about 25033.2583776064. The cubic root of 626664025 is about 855.7460856530.

The spelling of 626664025 in words is "six hundred twenty-six million, six hundred sixty-four thousand, twenty-five".