16395661 has 2 divisors, whose sum is σ = 16395662. Its totient is φ = 16395660.

The previous prime is 16395653. The next prime is 16395679. The reversal of 16395661 is 16659361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12823561 + 3572100 = 3581^2 + 1890^2 .

It is a cyclic number.

It is not a de Polignac number, because 16395661 - 2³ = 16395653 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16395661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16395601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8197830 + 8197831.

It is an arithmetic number, because the mean of its divisors is an integer number (8197831).

Almost surely, 2^16395661 is an apocalyptic number.

It is an amenable number.

16395661 is a deficient number, since it is larger than the sum of its proper divisors (1).

16395661 is an equidigital number, since it uses as much as digits as its factorization.

16395661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 16395661 is about 4049.1555909844. The cubic root of 16395661 is about 254.0444101569.

The spelling of 16395661 in words is "sixteen million, three hundred ninety-five thousand, six hundred sixty-one".