3278661 has 4 divisors (see below), whose sum is σ = 4371552. Its totient is φ = 2185772.

The previous prime is 3278651. The next prime is 3278669. The reversal of 3278661 is 1668723.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3278661 - 2⁵ = 3278629 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 2⁹ + 7⁴ + 8³ + 6⁴ + 6⁸ + 1 .

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3278669) 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, 546441 + ... + 546446.

It is an arithmetic number, because the mean of its divisors is an integer number (1092888).

Almost surely, 2^3278661 is an apocalyptic number.

It is an amenable number.

3278661 is a deficient number, since it is larger than the sum of its proper divisors (1092891).

3278661 is a wasteful number, since it uses less digits than its factorization.

3278661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092890.

The product of its digits is 12096, while the sum is 33.

The square root of 3278661 is about 1810.7073203585. The cubic root of 3278661 is about 148.5589558334.

It can be divided in two parts, 32 and 78661, that multiplied together give a palindrome (2517152).

The spelling of 3278661 in words is "three million, two hundred seventy-eight thousand, six hundred sixty-one".