6642794448 has 100 divisors (see below), whose sum is σ = 19259014368. Its totient is φ = 2210483520.

The previous prime is 6642794447. The next prime is 6642794453. The reversal of 6642794448 is 8444972466.

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

It is a junction number, because it is equal to n+sod(n) for n = 6642794394 and 6642794403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642794447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 813715 + ... + 821837.

Almost surely, 2^6642794448 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 6642794448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9629507184).

6642794448 is an abundant number, since it is smaller than the sum of its proper divisors (12616219920).

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

6642794448 is a wasteful number, since it uses less digits than its factorization.

6642794448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8774 (or 8759 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 54.

The square root of 6642794448 is about 81503.3401033356. The cubic root of 6642794448 is about 1879.8229092282.

The spelling of 6642794448 in words is "six billion, six hundred forty-two million, seven hundred ninety-four thousand, four hundred forty-eight".