3215306665 has 8 divisors (see below), whose sum is σ = 3894428160. Its totient is φ = 2548205232.

The previous prime is 3215306659. The next prime is 3215306669. The reversal of 3215306665 is 5666035123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3215306665 - 2⁷ = 3215306537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3215306669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3004425 + ... + 3005494.

It is an arithmetic number, because the mean of its divisors is an integer number (486803520).

Almost surely, 2^3215306665 is an apocalyptic number.

It is an amenable number.

3215306665 is a deficient number, since it is larger than the sum of its proper divisors (679121495).

3215306665 is a wasteful number, since it uses less digits than its factorization.

3215306665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010031.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 3215306665 is about 56703.6741754888. The cubic root of 3215306665 is about 1475.9584562512.

The spelling of 3215306665 in words is "three billion, two hundred fifteen million, three hundred six thousand, six hundred sixty-five".