3261666 has 8 divisors (see below), whose sum is σ = 6523344. Its totient is φ = 1087220.

The previous prime is 3261641. The next prime is 3261667. The reversal of 3261666 is 6661623.

3261666 is nontrivially palindromic in base 5.

It is a sphenic number, since it is the product of 3 distinct primes.

3261666 is an admirable number.

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

It is not an unprimeable number, because it can be changed into a prime (3261667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271800 + ... + 271811.

It is an arithmetic number, because the mean of its divisors is an integer number (815418).

Almost surely, 2^3261666 is an apocalyptic number.

3261666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3261666 is a wasteful number, since it uses less digits than its factorization.

3261666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543616.

The product of its digits is 7776, while the sum is 30.

The square root of 3261666 is about 1806.0083056287. The cubic root of 3261666 is about 148.3018250068.

Subtracting from 3261666 its sum of digits (30), we obtain a square (3261636 = 1806²).

The spelling of 3261666 in words is "three million, two hundred sixty-one thousand, six hundred sixty-six".