5666266 has 4 divisors (see below), whose sum is σ = 8499402. Its totient is φ = 2833132.

The previous prime is 5666263. The next prime is 5666267. The reversal of 5666266 is 6626665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6626665 = 5 ⋅1325333.

It can be written as a sum of positive squares in only one way, i.e., 4818025 + 848241 = 2195^2 + 921^2 .

It is not an unprimeable number, because it can be changed into a prime (5666261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1416565 + ... + 1416568.

Almost surely, 2^5666266 is an apocalyptic number.

5666266 is a deficient number, since it is larger than the sum of its proper divisors (2833136).

5666266 is a wasteful number, since it uses less digits than its factorization.

5666266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833135.

The product of its digits is 77760, while the sum is 37.

The square root of 5666266 is about 2380.3919845269. The cubic root of 5666266 is about 178.2785060635.

The spelling of 5666266 in words is "five million, six hundred sixty-six thousand, two hundred sixty-six".