18366830566 has 16 divisors (see below), whose sum is σ = 33338113056. Its totient is φ = 7408469376.

The previous prime is 18366830561. The next prime is 18366830621. The reversal of 18366830566 is 66503866381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366830561) 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, 38585541 + ... + 38586016.

It is an arithmetic number, because the mean of its divisors is an integer number (2083632066).

Almost surely, 2^18366830566 is an apocalyptic number.

18366830566 is a deficient number, since it is larger than the sum of its proper divisors (14971282490).

18366830566 is a wasteful number, since it uses less digits than its factorization.

18366830566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77171583.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 18366830566 in words is "eighteen billion, three hundred sixty-six million, eight hundred thirty thousand, five hundred sixty-six".