6642116021265 has 32 divisors (see below), whose sum is σ = 10671280029696. Its totient is φ = 3527841885120.

The previous prime is 6642116021249. The next prime is 6642116021353. The reversal of 6642116021265 is 5621206112466.

It is not a de Polignac number, because 6642116021265 - 2⁴ = 6642116021249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8939424 + ... + 9653886.

It is an arithmetic number, because the mean of its divisors is an integer number (333477500928).

Almost surely, 2^{6642116021265} is an apocalyptic number.

It is an amenable number.

6642116021265 is a deficient number, since it is larger than the sum of its proper divisors (4029164008431).

6642116021265 is a wasteful number, since it uses less digits than its factorization.

6642116021265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717029.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 6642116021265 in words is "six trillion, six hundred forty-two billion, one hundred sixteen million, twenty-one thousand, two hundred sixty-five".