6642689156733 has 16 divisors (see below), whose sum is σ = 10288130592896. Its totient is φ = 3733595778240.

The previous prime is 6642689156717. The next prime is 6642689156791. The reversal of 6642689156733 is 3376519862466.

It is not a de Polignac number, because 6642689156733 - 2⁴ = 6642689156717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642689156633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2592773566 + ... + 2592776127.

It is an arithmetic number, because the mean of its divisors is an integer number (643008162056).

Almost surely, 2^{6642689156733} is an apocalyptic number.

It is an amenable number.

6642689156733 is a deficient number, since it is larger than the sum of its proper divisors (3645441436163).

6642689156733 is a wasteful number, since it uses less digits than its factorization.

6642689156733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185549764.

The product of its digits is 235146240, while the sum is 66.

The spelling of 6642689156733 in words is "six trillion, six hundred forty-two billion, six hundred eighty-nine million, one hundred fifty-six thousand, seven hundred thirty-three".