5691866 has 12 divisors (see below), whose sum is σ = 8756286. Its totient is φ = 2774880.

The previous prime is 5691827. The next prime is 5691869. The reversal of 5691866 is 6681965.

It can be written as a sum of positive squares in 3 ways, for example, as 1575025 + 4116841 = 1255^2 + 2029^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (5691869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2516 + ... + 4208.

Almost surely, 2^5691866 is an apocalyptic number.

5691866 is a deficient number, since it is larger than the sum of its proper divisors (3064420).

5691866 is a wasteful number, since it uses less digits than its factorization.

5691866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777 (or 1736 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 5691866 is about 2385.7631902601. The cubic root of 5691866 is about 178.5465881790.

Subtracting 5691866 from its reverse (6681965), we obtain a palindrome (990099).

The spelling of 5691866 in words is "five million, six hundred ninety-one thousand, eight hundred sixty-six".