73317665 has 4 divisors (see below), whose sum is σ = 87981204. Its totient is φ = 58654128.

The previous prime is 73317619. The next prime is 73317667. The reversal of 73317665 is 56671337.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56671337 = 127 ⋅446231.

It can be written as a sum of positive squares in 2 ways, for example, as 44502241 + 28815424 = 6671^2 + 5368^2 .

It is a cyclic number.

It is not a de Polignac number, because 73317665 - 2¹⁰ = 73316641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73317667) 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, 7331762 + ... + 7331771.

It is an arithmetic number, because the mean of its divisors is an integer number (21995301).

Almost surely, 2^73317665 is an apocalyptic number.

It is an amenable number.

73317665 is a deficient number, since it is larger than the sum of its proper divisors (14663539).

73317665 is a wasteful number, since it uses less digits than its factorization.

73317665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14663538.

The product of its digits is 79380, while the sum is 38.

The square root of 73317665 is about 8562.5735033341. The cubic root of 73317665 is about 418.5392660617.

The spelling of 73317665 in words is "seventy-three million, three hundred seventeen thousand, six hundred sixty-five".