6610820591 has 2 divisors, whose sum is σ = 6610820592. Its totient is φ = 6610820590.

The previous prime is 6610820551. The next prime is 6610820597. The reversal of 6610820591 is 1950280166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6610820591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6610820597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305410295 + 3305410296.

It is an arithmetic number, because the mean of its divisors is an integer number (3305410296).

Almost surely, 2^6610820591 is an apocalyptic number.

6610820591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6610820591 is an equidigital number, since it uses as much as digits as its factorization.

6610820591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 6610820591 is about 81306.9529068701. The cubic root of 6610820591 is about 1876.8019977171.

The spelling of 6610820591 in words is "six billion, six hundred ten million, eight hundred twenty thousand, five hundred ninety-one".