665216612707 has 8 divisors (see below), whose sum is σ = 673740454320. Its totient is φ = 656716093440.

The previous prime is 665216612689. The next prime is 665216612719. The reversal of 665216612707 is 707216612566.

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 665216612707 - 2²⁷ = 665082394979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665216612777) 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, 5773173 + ... + 5887270.

It is an arithmetic number, because the mean of its divisors is an integer number (84217556790).

Almost surely, 2^665216612707 is an apocalyptic number.

665216612707 is a deficient number, since it is larger than the sum of its proper divisors (8523841613).

665216612707 is a wasteful number, since it uses less digits than its factorization.

665216612707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11661173.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 665216612707 in words is "six hundred sixty-five billion, two hundred sixteen million, six hundred twelve thousand, seven hundred seven".