2066796666673 has 4 divisors (see below), whose sum is σ = 2090019101220. Its totient is φ = 2043574232128.

The previous prime is 2066796666631. The next prime is 2066796666769. The reversal of 2066796666673 is 3766666976602.

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 1110983457024 + 955813209649 = 1054032^2 + 977657^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066796666673 - 2³⁷ = 1929357713201 is a prime.

It is a super-2 number, since 2×2066796666673² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066796666773) 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, 11611217140 + ... + 11611217317.

It is an arithmetic number, because the mean of its divisors is an integer number (522504775305).

Almost surely, 2^{2066796666673} is an apocalyptic number.

It is an amenable number.

2066796666673 is a deficient number, since it is larger than the sum of its proper divisors (23222434547).

2066796666673 is an equidigital number, since it uses as much as digits as its factorization.

2066796666673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23222434546.

The product of its (nonzero) digits is 740710656, while the sum is 70.

The spelling of 2066796666673 in words is "two trillion, sixty-six billion, seven hundred ninety-six million, six hundred sixty-six thousand, six hundred seventy-three".