83566666666538 has 64 divisors (see below), whose sum is σ = 141211233567360. Its totient is φ = 36766645094400.

The previous prime is 83566666666519. The next prime is 83566666666543.

83566666666538 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28677998 + ... + 31457286.

It is an arithmetic number, because the mean of its divisors is an integer number (2206425524490).

Almost surely, 2^{83566666666538} is an apocalyptic number.

83566666666538 is a deficient number, since it is larger than the sum of its proper divisors (57644566900822).

83566666666538 is a wasteful number, since it uses less digits than its factorization.

83566666666538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779703.

The product of its digits is 24186470400, while the sum is 80.

The spelling of 83566666666538 in words is "eighty-three trillion, five hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, five hundred thirty-eight".