841586661 has 12 divisors (see below), whose sum is σ = 1215891820. Its totient is φ = 560934720.

The previous prime is 841586657. The next prime is 841586677. The reversal of 841586661 is 166685148.

It can be written as a sum of positive squares in 2 ways, for example, as 636552900 + 205033761 = 25230^2 + 14319^2 .

It is not a de Polignac number, because 841586661 - 2² = 841586657 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 (841586651) 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, 54735 + ... + 68403.

Almost surely, 2^841586661 is an apocalyptic number.

It is an amenable number.

841586661 is a deficient number, since it is larger than the sum of its proper divisors (374305159).

841586661 is a wasteful number, since it uses less digits than its factorization.

841586661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20516 (or 20513 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 841586661 is about 29010.1130814756. The cubic root of 841586661 is about 944.1325002686.

The spelling of 841586661 in words is "eight hundred forty-one million, five hundred eighty-six thousand, six hundred sixty-one".