16538766666379 has 4 divisors (see below), whose sum is σ = 16538868704176. Its totient is φ = 16538664628584.

The previous prime is 16538766666347. The next prime is 16538766666391. The reversal of 16538766666379 is 97366666783561.

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 16538766666379 - 2⁵ = 16538766666347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16538766666299 and 16538766666308.

It is not an unprimeable number, because it can be changed into a prime (16538716666379) 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, 50775384 + ... + 51100069.

It is an arithmetic number, because the mean of its divisors is an integer number (4134717176044).

Almost surely, 2^{16538766666379} is an apocalyptic number.

16538766666379 is a deficient number, since it is larger than the sum of its proper divisors (102037797).

16538766666379 is a wasteful number, since it uses less digits than its factorization.

16538766666379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102037796.

The product of its digits is 7407106560, while the sum is 79.

The spelling of 16538766666379 in words is "sixteen trillion, five hundred thirty-eight billion, seven hundred sixty-six million, six hundred sixty-six thousand, three hundred seventy-nine".