6621059172 has 96 divisors (see below), whose sum is σ = 19182949632. Its totient is φ = 1730727936.

The previous prime is 6621059171. The next prime is 6621059189. The reversal of 6621059172 is 2719501266.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 6621059172.

It is not an unprimeable number, because it can be changed into a prime (6621059171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96568 + ... + 150224.

It is an arithmetic number, because the mean of its divisors is an integer number (199822392).

Almost surely, 2^6621059172 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 6621059172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9591474816).

6621059172 is an abundant number, since it is smaller than the sum of its proper divisors (12561890460).

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

6621059172 is a wasteful number, since it uses less digits than its factorization.

6621059172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53797 (or 53795 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 6621059172 is about 81369.8910654303. The cubic root of 6621059172 is about 1877.7704038484.

The spelling of 6621059172 in words is "six billion, six hundred twenty-one million, fifty-nine thousand, one hundred seventy-two".