5581766 has 4 divisors (see below), whose sum is σ = 8372652. Its totient is φ = 2790882.

The previous prime is 5581759. The next prime is 5581769. The reversal of 5581766 is 6671855.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6671855 = 5 ⋅1334371.

It is a super-2 number, since 2×5581766² = 62312223357512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395440 + ... + 1395443.

It is an arithmetic number, because the mean of its divisors is an integer number (2093163).

Almost surely, 2^5581766 is an apocalyptic number.

5581766 is a deficient number, since it is larger than the sum of its proper divisors (2790886).

5581766 is a wasteful number, since it uses less digits than its factorization.

5581766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790885.

The product of its digits is 50400, while the sum is 38.

The square root of 5581766 is about 2362.5761363393. The cubic root of 5581766 is about 177.3878521890.

The spelling of 5581766 in words is "five million, five hundred eighty-one thousand, seven hundred sixty-six".