70655665 has 16 divisors (see below), whose sum is σ = 89565696. Its totient is φ = 53424000.

The previous prime is 70655647. The next prime is 70655693. The reversal of 70655665 is 56655607.

It is not a de Polignac number, because 70655665 - 2⁷ = 70655537 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1365 + ... + 11965.

It is an arithmetic number, because the mean of its divisors is an integer number (5597856).

Almost surely, 2^70655665 is an apocalyptic number.

It is an amenable number.

70655665 is a deficient number, since it is larger than the sum of its proper divisors (18910031).

70655665 is a wasteful number, since it uses less digits than its factorization.

70655665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 70655665 is about 8405.6924164521. The cubic root of 70655665 is about 413.4112868206.

The spelling of 70655665 in words is "seventy million, six hundred fifty-five thousand, six hundred sixty-five".