66931629269 has 4 divisors (see below), whose sum is σ = 66932209344. Its totient is φ = 66931049196.

The previous prime is 66931629241. The next prime is 66931629277. The reversal of 66931629269 is 96292613966.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66931629269 - 2²⁰ = 66930580693 is a prime.

It is a super-2 number, since 2×66931629269² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66931625269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51647 + ... + 369500.

It is an arithmetic number, because the mean of its divisors is an integer number (16733052336).

Almost surely, 2^66931629269 is an apocalyptic number.

It is an amenable number.

66931629269 is a deficient number, since it is larger than the sum of its proper divisors (580075).

66931629269 is a wasteful number, since it uses less digits than its factorization.

66931629269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580074.

The product of its digits is 11337408, while the sum is 59.

The spelling of 66931629269 in words is "sixty-six billion, nine hundred thirty-one million, six hundred twenty-nine thousand, two hundred sixty-nine".