16610641 has 2 divisors, whose sum is σ = 16610642. Its totient is φ = 16610640.

The previous prime is 16610611. The next prime is 16610647. The reversal of 16610641 is 14601661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16160400 + 450241 = 4020^2 + 671^2 .

It is a cyclic number.

It is not a de Polignac number, because 16610641 - 2¹¹ = 16608593 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (16610647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305320 + 8305321.

It is an arithmetic number, because the mean of its divisors is an integer number (8305321).

Almost surely, 2^16610641 is an apocalyptic number.

It is an amenable number.

16610641 is a deficient number, since it is larger than the sum of its proper divisors (1).

16610641 is an equidigital number, since it uses as much as digits as its factorization.

16610641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 16610641 is about 4075.6154136523. The cubic root of 16610641 is about 255.1499361721.

The spelling of 16610641 in words is "sixteen million, six hundred ten thousand, six hundred forty-one".