5231666557 has 4 divisors (see below), whose sum is σ = 5634102460. Its totient is φ = 4829230656.

The previous prime is 5231666519. The next prime is 5231666567. The reversal of 5231666557 is 7556661325.

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 1418727556 + 3812939001 = 37666^2 + 61749^2 .

It is a cyclic number.

It is not a de Polignac number, because 5231666557 - 2¹⁹ = 5231142269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5231666507) 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, 201217932 + ... + 201217957.

It is an arithmetic number, because the mean of its divisors is an integer number (1408525615).

Almost surely, 2^5231666557 is an apocalyptic number.

It is an amenable number.

5231666557 is a deficient number, since it is larger than the sum of its proper divisors (402435903).

5231666557 is a wasteful number, since it uses less digits than its factorization.

5231666557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402435902.

The product of its digits is 1134000, while the sum is 46.

The square root of 5231666557 is about 72330.2603133709. The cubic root of 5231666557 is about 1735.9878665304.

The spelling of 5231666557 in words is "five billion, two hundred thirty-one million, six hundred sixty-six thousand, five hundred fifty-seven".