66736704069 has 24 divisors (see below), whose sum is σ = 111974575232. Its totient is φ = 37510089120.

The previous prime is 66736704019. The next prime is 66736704079. The reversal of 66736704069 is 96040763766.

It is not a de Polignac number, because 66736704069 - 2⁷ = 66736703941 is a prime.

It is a super-2 number, since 2×66736704069² (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 (66736704019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8679049 + ... + 8686734.

Almost surely, 2^66736704069 is an apocalyptic number.

It is an amenable number.

66736704069 is a deficient number, since it is larger than the sum of its proper divisors (45237871163).

66736704069 is a wasteful number, since it uses less digits than its factorization.

66736704069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17365857 (or 17365854 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 54.

The spelling of 66736704069 in words is "sixty-six billion, seven hundred thirty-six million, seven hundred four thousand, sixty-nine".