670617225 has 90 divisors (see below), whose sum is σ = 1277102970. Its totient is φ = 347846400.

The previous prime is 670617221. The next prime is 670617229. The reversal of 670617225 is 522716076.

It is an interprime number because it is at equal distance from previous prime (670617221) and next prime (670617229).

It can be written as a sum of positive squares in 9 ways, for example, as 624200256 + 46416969 = 24984^2 + 6813^2 .

It is not a de Polignac number, because 670617225 - 2² = 670617221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 670617225.

It is not an unprimeable number, because it can be changed into a prime (670617221) by changing a digit.

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 89 ways as a sum of consecutive naturals, for example, 7534981 + ... + 7535069.

It is an arithmetic number, because the mean of its divisors is an integer number (14190033).

Almost surely, 2^670617225 is an apocalyptic number.

It is an amenable number.

670617225 is a deficient number, since it is larger than the sum of its proper divisors (606485745).

670617225 is an equidigital number, since it uses as much as digits as its factorization.

670617225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 670617225 is about 25896.2782074954. The cubic root of 670617225 is about 875.3026327325.

The spelling of 670617225 in words is "six hundred seventy million, six hundred seventeen thousand, two hundred twenty-five".