6642869 has 16 divisors (see below), whose sum is σ = 7387200. Its totient is φ = 5946624.

The previous prime is 6642863. The next prime is 6642877. The reversal of 6642869 is 9682466.

It is a cyclic number.

It is not a de Polignac number, because 6642869 - 2⁸ = 6642613 is a prime.

It is a super-2 number, since 2×6642869² = 88255417102322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37022 + ... + 37200.

It is an arithmetic number, because the mean of its divisors is an integer number (461700).

Almost surely, 2^6642869 is an apocalyptic number.

It is an amenable number.

6642869 is a deficient number, since it is larger than the sum of its proper divisors (744331).

6642869 is a wasteful number, since it uses less digits than its factorization.

6642869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292.

The product of its digits is 124416, while the sum is 41.

The square root of 6642869 is about 2577.3763791887. The cubic root of 6642869 is about 187.9829941612.

The spelling of 6642869 in words is "six million, six hundred forty-two thousand, eight hundred sixty-nine".