655662625 has 8 divisors (see below), whose sum is σ = 818267112. Its totient is φ = 524530000.

The previous prime is 655662589. The next prime is 655662641. The reversal of 655662625 is 526266556.

It can be written as a sum of positive squares in 4 ways, for example, as 4800481 + 650862144 = 2191^2 + 25512^2 .

It is not a de Polignac number, because 655662625 - 2⁹ = 655662113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2622526 + ... + 2622775.

It is an arithmetic number, because the mean of its divisors is an integer number (102283389).

Almost surely, 2^655662625 is an apocalyptic number.

It is an amenable number.

655662625 is a deficient number, since it is larger than the sum of its proper divisors (162604487).

655662625 is an equidigital number, since it uses as much as digits as its factorization.

655662625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245316 (or 5245306 counting only the distinct ones).

The product of its digits is 648000, while the sum is 43.

The square root of 655662625 is about 25605.9099623505. The cubic root of 655662625 is about 868.7473163832.

The spelling of 655662625 in words is "six hundred fifty-five million, six hundred sixty-two thousand, six hundred twenty-five".