3165661 has 2 divisors, whose sum is σ = 3165662. Its totient is φ = 3165660.

The previous prime is 3165653. The next prime is 3165667. The reversal of 3165661 is 1665613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3132900 + 32761 = 1770^2 + 181^2 .

It is a cyclic number.

It is not a de Polignac number, because 3165661 - 2³ = 3165653 is a prime.

3165661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3165667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1582830 + 1582831.

It is an arithmetic number, because the mean of its divisors is an integer number (1582831).

Almost surely, 2^3165661 is an apocalyptic number.

It is an amenable number.

3165661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3165661 is an equidigital number, since it uses as much as digits as its factorization.

3165661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 3165661 is about 1779.2304516279. The cubic root of 3165661 is about 146.8322550125.

The spelling of 3165661 in words is "three million, one hundred sixty-five thousand, six hundred sixty-one".