19666041 has 8 divisors (see below), whose sum is σ = 26613024. Its totient is φ = 12914880.

The previous prime is 19666039. The next prime is 19666043. The reversal of 19666041 is 14066691.

It is an interprime number because it is at equal distance from previous prime (19666039) and next prime (19666043).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19666041 - 2¹ = 19666039 is a prime.

It is a super-2 number, since 2×19666041² = 773506337227362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19665993 and 19666011.

It is not an unprimeable number, because it can be changed into a prime (19666043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48720 + ... + 49121.

It is an arithmetic number, because the mean of its divisors is an integer number (3326628).

Almost surely, 2^19666041 is an apocalyptic number.

It is an amenable number.

19666041 is a deficient number, since it is larger than the sum of its proper divisors (6946983).

19666041 is an equidigital number, since it uses as much as digits as its factorization.

19666041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97911.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 19666041 is about 4434.6410226759. The cubic root of 19666041 is about 269.9224331367.

The spelling of 19666041 in words is "nineteen million, six hundred sixty-six thousand, forty-one".