6641791 has 4 divisors (see below), whose sum is σ = 7152712. Its totient is φ = 6130872.

The previous prime is 6641771. The next prime is 6641797. The reversal of 6641791 is 1971466.

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 6641791 - 2¹⁵ = 6609023 is a prime.

It is a super-2 number, since 2×6641791² = 88226775375362, 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 (6641797) 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, 255441 + ... + 255466.

It is an arithmetic number, because the mean of its divisors is an integer number (1788178).

Almost surely, 2^6641791 is an apocalyptic number.

6641791 is a deficient number, since it is larger than the sum of its proper divisors (510921).

6641791 is a wasteful number, since it uses less digits than its factorization.

6641791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510920.

The product of its digits is 9072, while the sum is 34.

The square root of 6641791 is about 2577.1672433119. The cubic root of 6641791 is about 187.9728250294.

The spelling of 6641791 in words is "six million, six hundred forty-one thousand, seven hundred ninety-one".