667251625 has 8 divisors (see below), whose sum is σ = 832730184. Its totient is φ = 533801200.

The previous prime is 667251587. The next prime is 667251659. The reversal of 667251625 is 526152766.

It can be written as a sum of positive squares in 4 ways, for example, as 5938969 + 661312656 = 2437^2 + 25716^2 .

It is not a de Polignac number, because 667251625 - 2¹¹ = 667249577 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2668882 + ... + 2669131.

It is an arithmetic number, because the mean of its divisors is an integer number (104091273).

Almost surely, 2^667251625 is an apocalyptic number.

It is an amenable number.

667251625 is a deficient number, since it is larger than the sum of its proper divisors (165478559).

667251625 is an equidigital number, since it uses as much as digits as its factorization.

667251625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338028 (or 5338018 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 667251625 is about 25831.2141603913. The cubic root of 667251625 is about 873.8358941294.

The spelling of 667251625 in words is "six hundred sixty-seven million, two hundred fifty-one thousand, six hundred twenty-five".