3666222 has 80 divisors (see below), whose sum is σ = 9722592. Its totient is φ = 1010880.

The previous prime is 3666197. The next prime is 3666233. The reversal of 3666222 is 2226663.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 60072 + ... + 60132.

Almost surely, 2^3666222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3666222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4861296).

3666222 is an abundant number, since it is smaller than the sum of its proper divisors (6056370).

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

3666222 is a wasteful number, since it uses less digits than its factorization.

3666222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 126 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 3666222 is about 1914.7381021957. The cubic root of 3666222 is about 154.1959332150.

The spelling of 3666222 in words is "three million, six hundred sixty-six thousand, two hundred twenty-two".