10066505609 has 4 divisors (see below), whose sum is σ = 10066714320. Its totient is φ = 10066296900.

The previous prime is 10066505573. The next prime is 10066505641. The reversal of 10066505609 is 90650566001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90650566001 = 79 ⋅1147475519.

It is a cyclic number.

It is not a de Polignac number, because 10066505609 - 2²⁸ = 9798070153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10066505209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9134 + ... + 142184.

It is an arithmetic number, because the mean of its divisors is an integer number (2516678580).

Almost surely, 2^10066505609 is an apocalyptic number.

It is an amenable number.

10066505609 is a deficient number, since it is larger than the sum of its proper divisors (208711).

10066505609 is an equidigital number, since it uses as much as digits as its factorization.

10066505609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208710.

The product of its (nonzero) digits is 48600, while the sum is 38.

The spelling of 10066505609 in words is "ten billion, sixty-six million, five hundred five thousand, six hundred nine".