66273712169 has 8 divisors (see below), whose sum is σ = 80196761088. Its totient is φ = 53464507200.

The previous prime is 66273712159. The next prime is 66273712177. The reversal of 66273712169 is 96121737266.

66273712169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66273712169 is a prime.

It is a super-2 number, since 2×66273712169² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66273712159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278460857 + ... + 278461094.

It is an arithmetic number, because the mean of its divisors is an integer number (10024595136).

Almost surely, 2^66273712169 is an apocalyptic number.

It is an amenable number.

66273712169 is a deficient number, since it is larger than the sum of its proper divisors (13923048919).

66273712169 is a wasteful number, since it uses less digits than its factorization.

66273712169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556921975.

The product of its digits is 1143072, while the sum is 50.

The spelling of 66273712169 in words is "sixty-six billion, two hundred seventy-three million, seven hundred twelve thousand, one hundred sixty-nine".