83666266638 has 32 divisors (see below), whose sum is σ = 167606799360. Its totient is φ = 27843086880.

The previous prime is 83666266597. The next prime is 83666266639.

83666266638 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83666266639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10550631 + ... + 10558557.

It is an arithmetic number, because the mean of its divisors is an integer number (5237712480).

Almost surely, 2^83666266638 is an apocalyptic number.

83666266638 is an abundant number, since it is smaller than the sum of its proper divisors (83940532722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83666266638 is a wasteful number, since it uses less digits than its factorization.

83666266638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10592.

The product of its digits is 53747712, while the sum is 60.

The spelling of 83666266638 in words is "eighty-three billion, six hundred sixty-six million, two hundred sixty-six thousand, six hundred thirty-eight".