3166861 has 4 divisors (see below), whose sum is σ = 3170592. Its totient is φ = 3163132.

The previous prime is 3166859. The next prime is 3166871. The reversal of 3166861 is 1686613.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1686613 = 23 ⋅73331.

It is a cyclic number.

It is not a de Polignac number, because 3166861 - 2¹ = 3166859 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 (3166831) 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, 96 + ... + 2518.

It is an arithmetic number, because the mean of its divisors is an integer number (792648).

Almost surely, 2^3166861 is an apocalyptic number.

It is an amenable number.

3166861 is a deficient number, since it is larger than the sum of its proper divisors (3731).

3166861 is a wasteful number, since it uses less digits than its factorization.

3166861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730.

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

The square root of 3166861 is about 1779.5676441203. The cubic root of 3166861 is about 146.8508057930.

The spelling of 3166861 in words is "three million, one hundred sixty-six thousand, eight hundred sixty-one".