83328890681 has 4 divisors (see below), whose sum is σ = 86951885952. Its totient is φ = 79705895412.

The previous prime is 83328890651. The next prime is 83328890683. The reversal of 83328890681 is 18609882338.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83328890681 is a prime.

It is a super-2 number, since 2×83328890681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83328890683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811497601 + ... + 1811497646.

It is an arithmetic number, because the mean of its divisors is an integer number (21737971488).

Almost surely, 2^83328890681 is an apocalyptic number.

It is an amenable number.

83328890681 is a deficient number, since it is larger than the sum of its proper divisors (3622995271).

83328890681 is a wasteful number, since it uses less digits than its factorization.

83328890681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622995270.

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 83328890681 in words is "eighty-three billion, three hundred twenty-eight million, eight hundred ninety thousand, six hundred eighty-one".