6642942973 has 8 divisors (see below), whose sum is σ = 6869560320. Its totient is φ = 6417096240.

The previous prime is 6642942949. The next prime is 6642942983. The reversal of 6642942973 is 3792492466.

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

It is a cyclic number.

It is not a de Polignac number, because 6642942973 - 2⁵ = 6642942941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6642942973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642942983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175093 + ... + 209626.

It is an arithmetic number, because the mean of its divisors is an integer number (858695040).

Almost surely, 2^6642942973 is an apocalyptic number.

It is an amenable number.

6642942973 is a deficient number, since it is larger than the sum of its proper divisors (226617347).

6642942973 is a wasteful number, since it uses less digits than its factorization.

6642942973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385307.

The product of its digits is 3919104, while the sum is 52.

The square root of 6642942973 is about 81504.2512572197. The cubic root of 6642942973 is about 1879.8369193269.

The spelling of 6642942973 in words is "six billion, six hundred forty-two million, nine hundred forty-two thousand, nine hundred seventy-three".