411791661 has 16 divisors (see below), whose sum is σ = 613166400. Its totient is φ = 273130704.

The previous prime is 411791651. The next prime is 411791683. The reversal of 411791661 is 166197114.

It is not a de Polignac number, because 411791661 - 2¹⁷ = 411660589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (411791641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33391 + ... + 44028.

It is an arithmetic number, because the mean of its divisors is an integer number (38322900).

Almost surely, 2^411791661 is an apocalyptic number.

It is an amenable number.

411791661 is a deficient number, since it is larger than the sum of its proper divisors (201374739).

411791661 is a wasteful number, since it uses less digits than its factorization.

411791661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77625 (or 77619 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 411791661 is about 20292.6504183165. The cubic root of 411791661 is about 743.9764398106.

The spelling of 411791661 in words is "four hundred eleven million, seven hundred ninety-one thousand, six hundred sixty-one".