5666814121 has 2 divisors, whose sum is σ = 5666814122. Its totient is φ = 5666814120.

The previous prime is 5666814103. The next prime is 5666814137. The reversal of 5666814121 is 1214186665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2851026025 + 2815788096 = 53395^2 + 53064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5666814121 is a prime.

It is a super-2 number, since 2×5666814121² = 64225564563930005282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5666814421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2833407060 + 2833407061.

It is an arithmetic number, because the mean of its divisors is an integer number (2833407061).

Almost surely, 2^5666814121 is an apocalyptic number.

It is an amenable number.

5666814121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5666814121 is an equidigital number, since it uses as much as digits as its factorization.

5666814121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 5666814121 is about 75278.2446726808. The cubic root of 5666814121 is about 1782.8425441366.

The spelling of 5666814121 in words is "five billion, six hundred sixty-six million, eight hundred fourteen thousand, one hundred twenty-one".