6650843904 has 432 divisors, whose sum is σ = 22231198080. Its totient is φ = 1970749440.

The previous prime is 6650843893. The next prime is 6650843917. The reversal of 6650843904 is 4093480566.

It is a tau number, because it is divible by the number of its divisors (432).

It is a super-2 number, since 2×6650843904² = 88467449270747922432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6650843904.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20093019 + ... + 20093349.

Almost surely, 2^6650843904 is an apocalyptic number.

6650843904 is a gapful number since it is divisible by the number (64) 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 6650843904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11115599040).

6650843904 is an abundant number, since it is smaller than the sum of its proper divisors (15580354176).

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

6650843904 is a wasteful number, since it uses less digits than its factorization.

6650843904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 6650843904 is about 81552.7062947638. The cubic root of 6650843904 is about 1880.5818992437.

The spelling of 6650843904 in words is "six billion, six hundred fifty million, eight hundred forty-three thousand, nine hundred four".