73086665 has 4 divisors (see below), whose sum is σ = 87704004. Its totient is φ = 58469328.

The previous prime is 73086653. The next prime is 73086667. The reversal of 73086665 is 56668037.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30680521 + 42406144 = 5539^2 + 6512^2 .

It is a cyclic number.

It is not a de Polignac number, because 73086665 - 2⁴ = 73086649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73086667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7308662 + ... + 7308671.

It is an arithmetic number, because the mean of its divisors is an integer number (21926001).

Almost surely, 2^73086665 is an apocalyptic number.

It is an amenable number.

73086665 is a deficient number, since it is larger than the sum of its proper divisors (14617339).

73086665 is a wasteful number, since it uses less digits than its factorization.

73086665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14617338.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 73086665 is about 8549.0739264554. The cubic root of 73086665 is about 418.0992434698.

The spelling of 73086665 in words is "seventy-three million, eighty-six thousand, six hundred sixty-five".