6641391 has 8 divisors (see below), whose sum is σ = 8867200. Its totient is φ = 4421592.

The previous prime is 6641387. The next prime is 6641399. The reversal of 6641391 is 1931466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6641391 - 2² = 6641387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3060 + ... + 4758.

It is an arithmetic number, because the mean of its divisors is an integer number (1108400).

Almost surely, 2^6641391 is an apocalyptic number.

6641391 is a deficient number, since it is larger than the sum of its proper divisors (2225809).

6641391 is a wasteful number, since it uses less digits than its factorization.

6641391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005.

The product of its digits is 3888, while the sum is 30.

The square root of 6641391 is about 2577.0896375563. The cubic root of 6641391 is about 187.9690514168.

The spelling of 6641391 in words is "six million, six hundred forty-one thousand, three hundred ninety-one".