83660203305 has 48 divisors (see below), whose sum is σ = 174449358720. Its totient is φ = 36231784704.

The previous prime is 83660203301. The next prime is 83660203321. The reversal of 83660203305 is 50330206638.

It is a happy number.

It is not a de Polignac number, because 83660203305 - 2² = 83660203301 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 83660203305.

It is not an unprimeable number, because it can be changed into a prime (83660203301) 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, 6983172 + ... + 6995141.

It is an arithmetic number, because the mean of its divisors is an integer number (3634361640).

Almost surely, 2^83660203305 is an apocalyptic number.

It is an amenable number.

83660203305 is an abundant number, since it is smaller than the sum of its proper divisors (90789155415).

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

83660203305 is a wasteful number, since it uses less digits than its factorization.

83660203305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13978350 (or 13978347 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 83660203305 in words is "eighty-three billion, six hundred sixty million, two hundred three thousand, three hundred five".