2331666 has 40 divisors (see below), whose sum is σ = 5379660. Its totient is φ = 754272.

The previous prime is 2331653. The next prime is 2331677. The reversal of 2331666 is 6661332.

It can be written as a sum of positive squares in 2 ways, for example, as 2313441 + 18225 = 1521^2 + 135^2 .

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 an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5800 + ... + 6188.

2^2331666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2331666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2689830).

2331666 is an abundant number, since it is smaller than the sum of its proper divisors (3047994).

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

2331666 is a wasteful number, since it uses less digits than its factorization.

2331666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 431 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 2331666 is about 1526.9793711770. The cubic root of 2331666 is about 132.6036402842.

Adding to 2331666 its reverse (6661332), we get a palindrome (8992998).

The spelling of 2331666 in words is "two million, three hundred thirty-one thousand, six hundred sixty-six".