6626791 has 4 divisors (see below), whose sum is σ = 6642000. Its totient is φ = 6611584.

The previous prime is 6626779. The next prime is 6626797. The reversal of 6626791 is 1976266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6626791 - 2¹¹ = 6624743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6626791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6626797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6931 + ... + 7828.

It is an arithmetic number, because the mean of its divisors is an integer number (1660500).

Almost surely, 2^6626791 is an apocalyptic number.

6626791 is a deficient number, since it is larger than the sum of its proper divisors (15209).

6626791 is a wasteful number, since it uses less digits than its factorization.

6626791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15208.

The product of its digits is 27216, while the sum is 37.

The square root of 6626791 is about 2574.2554263320. The cubic root of 6626791 is about 187.8312107340.

The spelling of 6626791 in words is "six million, six hundred twenty-six thousand, seven hundred ninety-one".