6618826864 has 90 divisors (see below), whose sum is σ = 14385457248. Its totient is φ = 2945779200.

The previous prime is 6618826829. The next prime is 6618826867. The reversal of 6618826864 is 4686288166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6618826867) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23554404 + ... + 23554684.

Almost surely, 2^6618826864 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 6618826864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7192728624).

6618826864 is an abundant number, since it is smaller than the sum of its proper divisors (7766630384).

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

6618826864 is a wasteful number, since it uses less digits than its factorization.

6618826864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 327 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 55.

The square root of 6618826864 is about 81356.1728696723. The cubic root of 6618826864 is about 1877.5593483379.

It can be divided in two parts, 661882 and 6864, that added together give a triangular number (668746 = T₁₁₅₆).

The spelling of 6618826864 in words is "six billion, six hundred eighteen million, eight hundred twenty-six thousand, eight hundred sixty-four".