66700680369 has 16 divisors (see below), whose sum is σ = 92703251520. Its totient is φ = 42606025280.

The previous prime is 66700680331. The next prime is 66700680391. The reversal of 66700680369 is 96308600766.

It is a cyclic number.

It is not a de Polignac number, because 66700680369 - 2¹⁶ = 66700614833 is a prime.

It is a super-2 number, since 2×66700680369² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66700680169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2914842 + ... + 2937635.

It is an arithmetic number, because the mean of its divisors is an integer number (5793953220).

Almost surely, 2^66700680369 is an apocalyptic number.

It is an amenable number.

66700680369 is a deficient number, since it is larger than the sum of its proper divisors (26002571151).

66700680369 is a wasteful number, since it uses less digits than its factorization.

66700680369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5852640.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 66700680369 in words is "sixty-six billion, seven hundred million, six hundred eighty thousand, three hundred sixty-nine".