70647665 has 24 divisors (see below), whose sum is σ = 98680680. Its totient is φ = 48350720.

The previous prime is 70647659. The next prime is 70647677. The reversal of 70647665 is 56674607.

It can be written as a sum of positive squares in 4 ways, for example, as 1308736 + 69338929 = 1144^2 + 8327^2 .

It is not a de Polignac number, because 70647665 - 2⁴ = 70647649 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 6851 + ... + 13719.

It is an arithmetic number, because the mean of its divisors is an integer number (4111695).

Almost surely, 2^70647665 is an apocalyptic number.

It is an amenable number.

70647665 is a deficient number, since it is larger than the sum of its proper divisors (28033015).

70647665 is a wasteful number, since it uses less digits than its factorization.

70647665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6913 (or 6902 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 70647665 is about 8405.2165349859. The cubic root of 70647665 is about 413.3956833766.

The spelling of 70647665 in words is "seventy million, six hundred forty-seven thousand, six hundred sixty-five".