16661713 has 2 divisors, whose sum is σ = 16661714. Its totient is φ = 16661712.

The previous prime is 16661707. The next prime is 16661741. The reversal of 16661713 is 31716661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9628609 + 7033104 = 3103^2 + 2652^2 .

It is a cyclic number.

It is not a de Polignac number, because 16661713 - 2⁵ = 16661681 is a prime.

It is a super-2 number, since 2×16661713² = 555225360188738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16661753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330856 + 8330857.

It is an arithmetic number, because the mean of its divisors is an integer number (8330857).

Almost surely, 2^16661713 is an apocalyptic number.

It is an amenable number.

16661713 is a deficient number, since it is larger than the sum of its proper divisors (1).

16661713 is an equidigital number, since it uses as much as digits as its factorization.

16661713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 16661713 is about 4081.8761617668. The cubic root of 16661713 is about 255.4111680136.

The spelling of 16661713 in words is "sixteen million, six hundred sixty-one thousand, seven hundred thirteen".