7866018864 has 480 divisors, whose sum is σ = 27298252800. Its totient is φ = 2164838400.

The previous prime is 7866018863. The next prime is 7866018893. The reversal of 7866018864 is 4688106687.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 7866018864.

It is not an unprimeable number, because it can be changed into a prime (7866018863) 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 95 ways as a sum of consecutive naturals, for example, 22538562 + ... + 22538910.

It is an arithmetic number, because the mean of its divisors is an integer number (56871360).

Almost surely, 2^7866018864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7866018864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13649126400).

7866018864 is an abundant number, since it is smaller than the sum of its proper divisors (19432233936).

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

7866018864 is a wasteful number, since it uses less digits than its factorization.

7866018864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 7866018864 is about 88690.5793418895. The cubic root of 7866018864 is about 1988.7719891778.

The spelling of 7866018864 in words is "seven billion, eight hundred sixty-six million, eighteen thousand, eight hundred sixty-four".