5211666 has 24 divisors (see below), whose sum is σ = 11378640. Its totient is φ = 1723896.

The previous prime is 5211659. The next prime is 5211667. The reversal of 5211666 is 6661125.

It is a happy number.

It is a super-2 number, since 2×5211666² = 54322924991112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5211667) 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, 1461 + ... + 3543.

It is an arithmetic number, because the mean of its divisors is an integer number (474110).

Almost surely, 2^5211666 is an apocalyptic number.

5211666 is an abundant number, since it is smaller than the sum of its proper divisors (6166974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5211666 is a wasteful number, since it uses less digits than its factorization.

5211666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230 (or 2227 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 5211666 is about 2282.9073568588. The cubic root of 5211666 is about 173.3772825768.

It can be divided in two parts, 521 and 1666, that added together give a 7-th power (2187 = 3⁷).

The spelling of 5211666 in words is "five million, two hundred eleven thousand, six hundred sixty-six".