82121666598 has 48 divisors (see below), whose sum is σ = 182759312736. Its totient is φ = 26634545280.

The previous prime is 82121666597. The next prime is 82121666609. The reversal of 82121666598 is 89566612128.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82121666597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126111 + ... + 424437.

It is an arithmetic number, because the mean of its divisors is an integer number (3807485682).

Almost surely, 2^82121666598 is an apocalyptic number.

82121666598 is an abundant number, since it is smaller than the sum of its proper divisors (100637646138).

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

82121666598 is a wasteful number, since it uses less digits than its factorization.

82121666598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298749 (or 298746 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 82121666598 in words is "eighty-two billion, one hundred twenty-one million, six hundred sixty-six thousand, five hundred ninety-eight".