7999221982 has 8 divisors (see below), whose sum is σ = 12122532576. Its totient is φ = 3958377792.

The previous prime is 7999221949. The next prime is 7999221983. The reversal of 7999221982 is 2891229997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×7999221982³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7999221983) 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, 20616358 + ... + 20616745.

It is an arithmetic number, because the mean of its divisors is an integer number (1515316572).

Almost surely, 2^7999221982 is an apocalyptic number.

7999221982 is a deficient number, since it is larger than the sum of its proper divisors (4123310594).

7999221982 is a wasteful number, since it uses less digits than its factorization.

7999221982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41233202.

The product of its digits is 2939328, while the sum is 58.

The square root of 7999221982 is about 89438.3697414035. The cubic root of 7999221982 is about 1999.9351630648.

The spelling of 7999221982 in words is "seven billion, nine hundred ninety-nine million, two hundred twenty-one thousand, nine hundred eighty-two".