8118722664 has 80 divisors (see below), whose sum is σ = 24489192420. Its totient is φ = 2498065920.

The previous prime is 8118722663. The next prime is 8118722683. The reversal of 8118722664 is 4662278118.

It can be written as a sum of positive squares in 2 ways, for example, as 6763746564 + 1354976100 = 82242^2 + 36810^2 .

It is not an unprimeable number, because it can be changed into a prime (8118722663) 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 19 ways as a sum of consecutive naturals, for example, 473457 + ... + 490304.

Almost surely, 2^8118722664 is an apocalyptic number.

It is an amenable number.

8118722664 is an abundant number, since it is smaller than the sum of its proper divisors (16370469756).

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

8118722664 is a wasteful number, since it uses less digits than its factorization.

8118722664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963792 (or 963779 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 8118722664 is about 90103.9547633732. The cubic root of 8118722664 is about 2009.8450136679.

The spelling of 8118722664 in words is "eight billion, one hundred eighteen million, seven hundred twenty-two thousand, six hundred sixty-four".