6642939793 has 8 divisors (see below), whose sum is σ = 7630083200. Its totient is φ = 5665334400.

The previous prime is 6642939773. The next prime is 6642939817. The reversal of 6642939793 is 3979392466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6642939793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6642939763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2383008 + ... + 2385793.

It is an arithmetic number, because the mean of its divisors is an integer number (953760400).

Almost surely, 2^6642939793 is an apocalyptic number.

It is an amenable number.

6642939793 is a deficient number, since it is larger than the sum of its proper divisors (987143407).

6642939793 is a wasteful number, since it uses less digits than its factorization.

6642939793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769007.

The product of its digits is 13226976, while the sum is 58.

The square root of 6642939793 is about 81504.2317490325. The cubic root of 6642939793 is about 1879.8366193653.

The spelling of 6642939793 in words is "six billion, six hundred forty-two million, nine hundred thirty-nine thousand, seven hundred ninety-three".