83660056121 has 4 divisors (see below), whose sum is σ = 83660637072. Its totient is φ = 83659475172.

The previous prime is 83660056061. The next prime is 83660056147. The reversal of 83660056121 is 12165006638.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 83660056121 - 2¹⁰ = 83660055097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83660056171) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 105110 + ... + 422336.

It is an arithmetic number, because the mean of its divisors is an integer number (20915159268).

Almost surely, 2^83660056121 is an apocalyptic number.

It is an amenable number.

83660056121 is a deficient number, since it is larger than the sum of its proper divisors (580951).

83660056121 is a wasteful number, since it uses less digits than its factorization.

83660056121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580950.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 83660056121 in words is "eighty-three billion, six hundred sixty million, fifty-six thousand, one hundred twenty-one".