3168661 has 4 divisors (see below), whose sum is σ = 3174400. Its totient is φ = 3162924.

The previous prime is 3168653. The next prime is 3168679. The reversal of 3168661 is 1668613.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1668613 = 647 ⋅2579.

It is a cyclic number.

It is not a de Polignac number, because 3168661 - 2³ = 3168653 is a prime.

It is a Duffinian number.

3168661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3168461) 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, 1941 + ... + 3178.

It is an arithmetic number, because the mean of its divisors is an integer number (793600).

Almost surely, 2^3168661 is an apocalyptic number.

It is an amenable number.

3168661 is a deficient number, since it is larger than the sum of its proper divisors (5739).

3168661 is an equidigital number, since it uses as much as digits as its factorization.

3168661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738.

The product of its digits is 5184, while the sum is 31.

The square root of 3168661 is about 1780.0733130970. The cubic root of 3168661 is about 146.8786231791.

The spelling of 3168661 in words is "three million, one hundred sixty-eight thousand, six hundred sixty-one".