6650591 has 2 divisors, whose sum is σ = 6650592. Its totient is φ = 6650590.

The previous prime is 6650561. The next prime is 6650597. The reversal of 6650591 is 1950566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6650591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6650597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325295 + 3325296.

It is an arithmetic number, because the mean of its divisors is an integer number (3325296).

Almost surely, 2^6650591 is an apocalyptic number.

6650591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650591 is an equidigital number, since it uses as much as digits as its factorization.

6650591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 6650591 is about 2578.8739790847. The cubic root of 6650591 is about 188.0558062032.

The spelling of 6650591 in words is "six million, six hundred fifty thousand, five hundred ninety-one".