6642723 has 8 divisors (see below), whose sum is σ = 9323200. Its totient is φ = 4195368.

The previous prime is 6642709. The next prime is 6642763. The reversal of 6642723 is 3272466.

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

It is not a de Polignac number, because 6642723 - 2⁴ = 6642707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6642763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58213 + ... + 58326.

It is an arithmetic number, because the mean of its divisors is an integer number (1165400).

Almost surely, 2^6642723 is an apocalyptic number.

6642723 is a deficient number, since it is larger than the sum of its proper divisors (2680477).

6642723 is a wasteful number, since it uses less digits than its factorization.

6642723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116561.

The product of its digits is 12096, while the sum is 30.

The square root of 6642723 is about 2577.3480556572. The cubic root of 6642723 is about 187.9816169591.

The spelling of 6642723 in words is "six million, six hundred forty-two thousand, seven hundred twenty-three".