3166661 has 2 divisors, whose sum is σ = 3166662. Its totient is φ = 3166660.

The previous prime is 3166651. The next prime is 3166679. The reversal of 3166661 is 1666613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2869636 + 297025 = 1694^2 + 545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3166661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3166651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1583330 + 1583331.

It is an arithmetic number, because the mean of its divisors is an integer number (1583331).

Almost surely, 2^3166661 is an apocalyptic number.

It is an amenable number.

3166661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3166661 is an equidigital number, since it uses as much as digits as its factorization.

3166661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 3166661 is about 1779.5114498086. The cubic root of 3166661 is about 146.8477143217.

The spelling of 3166661 in words is "three million, one hundred sixty-six thousand, six hundred sixty-one".