19660106 has 4 divisors (see below), whose sum is σ = 29490162. Its totient is φ = 9830052.

The previous prime is 19660099. The next prime is 19660133. The reversal of 19660106 is 60106691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17147881 + 2512225 = 4141^2 + 1585^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4915025 + ... + 4915028.

Almost surely, 2^19660106 is an apocalyptic number.

19660106 is a deficient number, since it is larger than the sum of its proper divisors (9830056).

19660106 is an equidigital number, since it uses as much as digits as its factorization.

19660106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9830055.

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

The square root of 19660106 is about 4433.9718086609. The cubic root of 19660106 is about 269.8952771741.

Adding to 19660106 its reverse (60106691), we get a palindrome (79766797).

The spelling of 19660106 in words is "nineteen million, six hundred sixty thousand, one hundred six".