3261663 has 6 divisors (see below), whose sum is σ = 4711304. Its totient is φ = 2174436.

The previous prime is 3261641. The next prime is 3261667. The reversal of 3261663 is 3661623.

It is not a de Polignac number, because 3261663 - 2⁵ = 3261631 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181195 + ... + 181212.

Almost surely, 2^3261663 is an apocalyptic number.

3261663 is a deficient number, since it is larger than the sum of its proper divisors (1449641).

3261663 is a wasteful number, since it uses less digits than its factorization.

3261663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362413 (or 362410 counting only the distinct ones).

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

The square root of 3261663 is about 1806.0074750676. The cubic root of 3261663 is about 148.3017795386.

Subtracting from 3261663 its sum of digits (27), we obtain a square (3261636 = 1806²).

The spelling of 3261663 in words is "three million, two hundred sixty-one thousand, six hundred sixty-three".