7981931966 has 16 divisors (see below), whose sum is σ = 12073459200. Its totient is φ = 3957478560.

The previous prime is 7981931963. The next prime is 7981932001. The reversal of 7981931966 is 6691391897.

It is a super-2 number, since 2×7981931966² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981931963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557060 + ... + 571208.

It is an arithmetic number, because the mean of its divisors is an integer number (754591200).

Almost surely, 2^7981931966 is an apocalyptic number.

7981931966 is a deficient number, since it is larger than the sum of its proper divisors (4091527234).

7981931966 is a wasteful number, since it uses less digits than its factorization.

7981931966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16499.

The product of its digits is 4408992, while the sum is 59.

The square root of 7981931966 is about 89341.6586257497. The cubic root of 7981931966 is about 1998.4931955553.

It can be divided in two parts, 7981931 and 966, that added together give a palindrome (7982897).

The spelling of 7981931966 in words is "seven billion, nine hundred eighty-one million, nine hundred thirty-one thousand, nine hundred sixty-six".