70665625 has 12 divisors (see below), whose sum is σ = 88330284. Its totient is φ = 56530000.

The previous prime is 70665613. The next prime is 70665629. The reversal of 70665625 is 52656607.

It can be written as a sum of positive squares in 6 ways, for example, as 60031504 + 10634121 = 7748^2 + 3261^2 .

It is not a de Polignac number, because 70665625 - 2⁵ = 70665593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70665629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8182 + ... + 14431.

It is an arithmetic number, because the mean of its divisors is an integer number (7360857).

Almost surely, 2^70665625 is an apocalyptic number.

It is an amenable number.

70665625 is a deficient number, since it is larger than the sum of its proper divisors (17664659).

70665625 is an frugal number, since it uses more digits than its factorization.

70665625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22638 (or 22618 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 70665625 is about 8406.2848512289. The cubic root of 70665625 is about 413.4307114624.

The spelling of 70665625 in words is "seventy million, six hundred sixty-five thousand, six hundred twenty-five".