6653591 has 12 divisors (see below), whose sum is σ = 8028432. Its totient is φ = 5400864.

The previous prime is 6653587. The next prime is 6653593. The reversal of 6653591 is 1953566.

It is not a de Polignac number, because 6653591 - 2² = 6653587 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 (6653593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1211 + ... + 3843.

It is an arithmetic number, because the mean of its divisors is an integer number (669036).

Almost surely, 2^6653591 is an apocalyptic number.

6653591 is a deficient number, since it is larger than the sum of its proper divisors (1374841).

6653591 is a wasteful number, since it uses less digits than its factorization.

6653591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678 (or 2659 counting only the distinct ones).

The product of its digits is 24300, while the sum is 35.

The square root of 6653591 is about 2579.4555627109. The cubic root of 6653591 is about 188.0840785082.

The spelling of 6653591 in words is "six million, six hundred fifty-three thousand, five hundred ninety-one".