6620859000 has 320 divisors, whose sum is σ = 26452071360. Its totient is φ = 1513209600.

The previous prime is 6620858999. The next prime is 6620859023. The reversal of 6620859000 is 9580266.

6620859000 is a `hidden beast` number, since 6 + 62 + 0 + 8 + 590 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 561162 + ... + 572838.

It is an arithmetic number, because the mean of its divisors is an integer number (82662723).

Almost surely, 2^6620859000 is an apocalyptic number.

6620859000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6620859000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13226035680).

6620859000 is an abundant number, since it is smaller than the sum of its proper divisors (19831212360).

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

6620859000 is a wasteful number, since it uses less digits than its factorization.

6620859000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11717 (or 11694 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 6620859000 is about 81368.6610434263. The cubic root of 6620859000 is about 1877.7514803481.

The spelling of 6620859000 in words is "six billion, six hundred twenty million, eight hundred fifty-nine thousand".