320866666899 has 4 divisors (see below), whose sum is σ = 427822222536. Its totient is φ = 213911111264.

The previous prime is 320866666877. The next prime is 320866666919. The reversal of 320866666899 is 998666668023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320866666899 - 2¹² = 320866662803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320866666399) 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, 53477777814 + ... + 53477777819.

It is an arithmetic number, because the mean of its divisors is an integer number (106955555634).

Almost surely, 2^320866666899 is an apocalyptic number.

320866666899 is a deficient number, since it is larger than the sum of its proper divisors (106955555637).

320866666899 is a wasteful number, since it uses less digits than its factorization.

320866666899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106955555636.

The product of its (nonzero) digits is 241864704, while the sum is 69.

The spelling of 320866666899 in words is "three hundred twenty billion, eight hundred sixty-six million, six hundred sixty-six thousand, eight hundred ninety-nine".