83666804247 has 48 divisors (see below), whose sum is σ = 137043903360. Its totient is φ = 48761165376.

The previous prime is 83666804173. The next prime is 83666804327. The reversal of 83666804247 is 74240866638.

It is not a de Polignac number, because 83666804247 - 2¹⁰ = 83666803223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83666804193 and 83666804202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83666800247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11082328 + ... + 11089874.

It is an arithmetic number, because the mean of its divisors is an integer number (2855081320).

Almost surely, 2^83666804247 is an apocalyptic number.

83666804247 is a deficient number, since it is larger than the sum of its proper divisors (53377099113).

83666804247 is a wasteful number, since it uses less digits than its factorization.

83666804247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12572 (or 12569 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 83666804247 in words is "eighty-three billion, six hundred sixty-six million, eight hundred four thousand, two hundred forty-seven".