66966956269 has 4 divisors (see below), whose sum is σ = 68776874044. Its totient is φ = 65157038496.

The previous prime is 66966956267. The next prime is 66966956323. The reversal of 66966956269 is 96265966966.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51288660900 + 15678295369 = 226470^2 + 125213^2 .

It is a cyclic number.

It is not a de Polignac number, because 66966956269 - 2¹ = 66966956267 is a prime.

It is a super-2 number, since 2×66966956269² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66966956198 and 66966956207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66966956267) 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, 904958832 + ... + 904958905.

It is an arithmetic number, because the mean of its divisors is an integer number (17194218511).

Almost surely, 2^66966956269 is an apocalyptic number.

It is an amenable number.

66966956269 is a deficient number, since it is larger than the sum of its proper divisors (1809917775).

66966956269 is a wasteful number, since it uses less digits than its factorization.

66966956269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809917774.

The product of its digits is 340122240, while the sum is 70.

The spelling of 66966956269 in words is "sixty-six billion, nine hundred sixty-six million, nine hundred fifty-six thousand, two hundred sixty-nine".