6696591 has 16 divisors (see below), whose sum is σ = 9787008. Its totient is φ = 4039200.

The previous prime is 6696587. The next prime is 6696601. The reversal of 6696591 is 1956966.

It is not a de Polignac number, because 6696591 - 2² = 6696587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6696581) 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 15 ways as a sum of consecutive naturals, for example, 9801 + ... + 10461.

It is an arithmetic number, because the mean of its divisors is an integer number (611688).

Almost surely, 2^6696591 is an apocalyptic number.

6696591 is a deficient number, since it is larger than the sum of its proper divisors (3090417).

6696591 is a wasteful number, since it uses less digits than its factorization.

6696591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982.

The product of its digits is 87480, while the sum is 42.

The square root of 6696591 is about 2587.7772315252. Note that the first 3 decimals coincide. The cubic root of 6696591 is about 188.4883842491.

It can be divided in two parts, 669 and 6591, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6696591 in words is "six million, six hundred ninety-six thousand, five hundred ninety-one".