5666678869 has 2 divisors, whose sum is σ = 5666678870. Its totient is φ = 5666678868.

The previous prime is 5666678813. The next prime is 5666678891. The reversal of 5666678869 is 9688766665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5353848900 + 312829969 = 73170^2 + 17687^2 .

It is a cyclic number.

It is not a de Polignac number, because 5666678869 - 2¹⁵ = 5666646101 is a prime.

It is a super-2 number, since 2×5666678869² = 64222498808742238322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5666679869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2833339434 + 2833339435.

It is an arithmetic number, because the mean of its divisors is an integer number (2833339435).

Almost surely, 2^5666678869 is an apocalyptic number.

It is an amenable number.

5666678869 is a deficient number, since it is larger than the sum of its proper divisors (1).

5666678869 is an equidigital number, since it uses as much as digits as its factorization.

5666678869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156764160, while the sum is 67.

The square root of 5666678869 is about 75277.3463201248. The cubic root of 5666678869 is about 1782.8283600975.

The spelling of 5666678869 in words is "five billion, six hundred sixty-six million, six hundred seventy-eight thousand, eight hundred sixty-nine".