10010005666 has 4 divisors (see below), whose sum is σ = 15015008502. Its totient is φ = 5005002832.

The previous prime is 10010005609. The next prime is 10010005693. The reversal of 10010005666 is 66650001001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66650001001 = 47809 ⋅1394089.

It can be written as a sum of positive squares in only one way, i.e., 9855525625 + 154480041 = 99275^2 + 12429^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 10010005666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2502501415 + ... + 2502501418.

Almost surely, 2^10010005666 is an apocalyptic number.

10010005666 is a deficient number, since it is larger than the sum of its proper divisors (5005002836).

10010005666 is an equidigital number, since it uses as much as digits as its factorization.

10010005666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005002835.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 10010005666 its reverse (66650001001), we get a palindrome (76660006667).

The spelling of 10010005666 in words is "ten billion, ten million, five thousand, six hundred sixty-six".