666115616659 has 8 divisors (see below), whose sum is σ = 678446118000. Its totient is φ = 653892805632.

The previous prime is 666115616657. The next prime is 666115616669. The reversal of 666115616659 is 956616511666.

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 666115616659 - 2¹ = 666115616657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666115616657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26910094 + ... + 26934835.

It is an arithmetic number, because the mean of its divisors is an integer number (84805764750).

Almost surely, 2^666115616659 is an apocalyptic number.

666115616659 is a deficient number, since it is larger than the sum of its proper divisors (12330501341).

666115616659 is a wasteful number, since it uses less digits than its factorization.

666115616659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53845157.

The product of its digits is 10497600, while the sum is 58.

The spelling of 666115616659 in words is "six hundred sixty-six billion, one hundred fifteen million, six hundred sixteen thousand, six hundred fifty-nine".