16659766379 has 4 divisors (see below), whose sum is σ = 16673639160. Its totient is φ = 16645893600.

The previous prime is 16659766309. The next prime is 16659766421. The reversal of 16659766379 is 97366795661.

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 16659766379 - 2¹² = 16659762283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16659766309) 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 3 ways as a sum of consecutive naturals, for example, 6934589 + ... + 6936990.

It is an arithmetic number, because the mean of its divisors is an integer number (4168409790).

Almost surely, 2^16659766379 is an apocalyptic number.

16659766379 is a deficient number, since it is larger than the sum of its proper divisors (13872781).

16659766379 is a wasteful number, since it uses less digits than its factorization.

16659766379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13872780.

The product of its digits is 77157360, while the sum is 65.

The spelling of 16659766379 in words is "sixteen billion, six hundred fifty-nine million, seven hundred sixty-six thousand, three hundred seventy-nine".