566666788945 has 4 divisors (see below), whose sum is σ = 680000146740. Its totient is φ = 453333431152.

The previous prime is 566666788943. The next prime is 566666788981. The reversal of 566666788945 is 549887666665.

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 265591806736 + 301074982209 = 515356^2 + 548703^2 .

It is a cyclic number.

It is not a de Polignac number, because 566666788945 - 2¹ = 566666788943 is a prime.

It is a super-2 number, since 2×566666788945² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (566666788943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56666678890 + ... + 56666678899.

It is an arithmetic number, because the mean of its divisors is an integer number (170000036685).

Almost surely, 2^566666788945 is an apocalyptic number.

It is an amenable number.

566666788945 is a deficient number, since it is larger than the sum of its proper divisors (113333357795).

566666788945 is a wasteful number, since it uses less digits than its factorization.

566666788945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113333357794.

The product of its digits is 3135283200, while the sum is 76.

The spelling of 566666788945 in words is "five hundred sixty-six billion, six hundred sixty-six million, seven hundred eighty-eight thousand, nine hundred forty-five".