6665312708999 has 16 divisors (see below), whose sum is σ = 7744488178176. Its totient is φ = 5617935295200.

The previous prime is 6665312708983. The next prime is 6665312709061. The reversal of 6665312708999 is 9998072135666.

It is a cyclic number.

It is not a de Polignac number, because 6665312708999 - 2⁴ = 6665312708983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665312708909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558557 + ... + 3693590.

It is an arithmetic number, because the mean of its divisors is an integer number (484030511136).

Almost surely, 2^{6665312708999} is an apocalyptic number.

6665312708999 is a deficient number, since it is larger than the sum of its proper divisors (1079175469177).

6665312708999 is a wasteful number, since it uses less digits than its factorization.

6665312708999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255886.

The product of its (nonzero) digits is 264539520, while the sum is 71.

The spelling of 6665312708999 in words is "six trillion, six hundred sixty-five billion, three hundred twelve million, seven hundred eight thousand, nine hundred ninety-nine".