6619914864 has 140 divisors (see below), whose sum is σ = 19292980200. Its totient is φ = 2199457152.

The previous prime is 6619914857. The next prime is 6619914911. The reversal of 6619914864 is 4684199166.

It is a happy number.

6619914864 is a `hidden beast` number, since 6 + 619 + 9 + 14 + 8 + 6 + 4 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 6619914864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4536567 + ... + 4538025.

Almost surely, 2^6619914864 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 6619914864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9646490100).

6619914864 is an abundant number, since it is smaller than the sum of its proper divisors (12673065336).

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

6619914864 is a wasteful number, since it uses less digits than its factorization.

6619914864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874 (or 1853 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 6619914864 is about 81362.8592417941. The cubic root of 6619914864 is about 1877.6622201757.

The spelling of 6619914864 in words is "six billion, six hundred nineteen million, nine hundred fourteen thousand, eight hundred sixty-four".