6626491 has 4 divisors (see below), whose sum is σ = 6735184. Its totient is φ = 6517800.

The previous prime is 6626453. The next prime is 6626513. The reversal of 6626491 is 1946266.

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 6626491 - 2⁹ = 6625979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6696491) 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 3 ways as a sum of consecutive naturals, for example, 54255 + ... + 54376.

It is an arithmetic number, because the mean of its divisors is an integer number (1683796).

Almost surely, 2^6626491 is an apocalyptic number.

6626491 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6626491 is a deficient number, since it is larger than the sum of its proper divisors (108693).

6626491 is a wasteful number, since it uses less digits than its factorization.

6626491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108692.

The product of its digits is 15552, while the sum is 34.

The square root of 6626491 is about 2574.1971563965. The cubic root of 6626491 is about 187.8283762694.

It can be divided in two parts, 6626 and 491, that added together give a palindrome (7117).

The spelling of 6626491 in words is "six million, six hundred twenty-six thousand, four hundred ninety-one".