6722591 has 4 divisors (see below), whose sum is σ = 6727872. Its totient is φ = 6717312.

The previous prime is 6722587. The next prime is 6722593. The reversal of 6722591 is 1952276.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6722591 - 2² = 6722587 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 (6722593) 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, 575 + ... + 3711.

It is an arithmetic number, because the mean of its divisors is an integer number (1681968).

Almost surely, 2^6722591 is an apocalyptic number.

6722591 is a deficient number, since it is larger than the sum of its proper divisors (5281).

6722591 is a wasteful number, since it uses less digits than its factorization.

6722591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280.

The product of its digits is 7560, while the sum is 32.

The square root of 6722591 is about 2592.7959811755. The cubic root of 6722591 is about 188.7320091620.

The spelling of 6722591 in words is "six million, seven hundred twenty-two thousand, five hundred ninety-one".