66706673703707 has 16 divisors (see below), whose sum is σ = 74348392181760. Its totient is φ = 59478078989952.

The previous prime is 66706673703679. The next prime is 66706673703731. The reversal of 66706673703707 is 70730737660766.

It is a cyclic number.

It is not a de Polignac number, because 66706673703707 - 2⁶ = 66706673703643 is a prime.

It is a super-2 number, since 2×66706673703707² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66706673723707) 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, 76902338 + ... + 77764920.

It is an arithmetic number, because the mean of its divisors is an integer number (4646774511360).

Almost surely, 2^{66706673703707} is an apocalyptic number.

66706673703707 is a deficient number, since it is larger than the sum of its proper divisors (7641718478053).

66706673703707 is a wasteful number, since it uses less digits than its factorization.

66706673703707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102042.

The product of its (nonzero) digits is 196036848, while the sum is 65.

The spelling of 66706673703707 in words is "sixty-six trillion, seven hundred six billion, six hundred seventy-three million, seven hundred three thousand, seven hundred seven".