70165665 has 24 divisors (see below), whose sum is σ = 121823208. Its totient is φ = 37359360.

The previous prime is 70165661. The next prime is 70165717. The reversal of 70165665 is 56656107.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5716881 + 64448784 = 2391^2 + 8028^2 .

It is not a de Polignac number, because 70165665 - 2² = 70165661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70165661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41517 + ... + 43173.

It is an arithmetic number, because the mean of its divisors is an integer number (5075967).

Almost surely, 2^70165665 is an apocalyptic number.

It is an amenable number.

70165665 is a deficient number, since it is larger than the sum of its proper divisors (51657543).

70165665 is a wasteful number, since it uses less digits than its factorization.

70165665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609 (or 2606 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 70165665 is about 8376.4947919759. The cubic root of 70165665 is about 412.4533941835.

It can be divided in two parts, 701 and 65665, that added together give a palindrome (66366).

The spelling of 70165665 in words is "seventy million, one hundred sixty-five thousand, six hundred sixty-five".