5666401243 has 4 divisors (see below), whose sum is σ = 5773314528. Its totient is φ = 5559487960.

The previous prime is 5666401219. The next prime is 5666401253. The reversal of 5666401243 is 3421046665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3421046665 = 5 ⋅684209333.

It is a cyclic number.

It is not a de Polignac number, because 5666401243 - 2⁵ = 5666401211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5666401253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53456563 + ... + 53456668.

It is an arithmetic number, because the mean of its divisors is an integer number (1443328632).

Almost surely, 2^5666401243 is an apocalyptic number.

5666401243 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

5666401243 is a deficient number, since it is larger than the sum of its proper divisors (106913285).

5666401243 is a wasteful number, since it uses less digits than its factorization.

5666401243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106913284.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 5666401243 is about 75275.5022766371. The cubic root of 5666401243 is about 1782.7992444196.

The spelling of 5666401243 in words is "five billion, six hundred sixty-six million, four hundred one thousand, two hundred forty-three".