16090661 has 2 divisors, whose sum is σ = 16090662. Its totient is φ = 16090660.

The previous prime is 16090609. The next prime is 16090673. The reversal of 16090661 is 16609061.

16090661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13734436 + 2356225 = 3706^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 16090661 - 2¹⁴ = 16074277 is a prime.

It is a Chen prime.

It is equal to p_1036559 and since 16090661 and 1036559 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16098661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8045330 + 8045331.

It is an arithmetic number, because the mean of its divisors is an integer number (8045331).

Almost surely, 2^16090661 is an apocalyptic number.

It is an amenable number.

16090661 is a deficient number, since it is larger than the sum of its proper divisors (1).

16090661 is an equidigital number, since it uses as much as digits as its factorization.

16090661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 16090661 is about 4011.3166167731. The cubic root of 16090661 is about 252.4592542820.

Subtracting 16090661 from its reverse (16609061), we obtain a square (518400 = 720²).

The spelling of 16090661 in words is "sixteen million, ninety thousand, six hundred sixty-one".