2166558239 has 8 divisors (see below), whose sum is σ = 2306214000. Its totient is φ = 2029465152.

The previous prime is 2166558227. The next prime is 2166558241. The reversal of 2166558239 is 9328556612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166558239 - 2⁴ = 2166558223 is a prime.

It is a super-2 number, since 2×2166558239² = 9387949205957562242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2166558193 and 2166558202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166558739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638924 + ... + 642305.

It is an arithmetic number, because the mean of its divisors is an integer number (288276750).

Almost surely, 2^2166558239 is an apocalyptic number.

2166558239 is a deficient number, since it is larger than the sum of its proper divisors (139655761).

2166558239 is a wasteful number, since it uses less digits than its factorization.

2166558239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281337.

The product of its digits is 777600, while the sum is 47.

The square root of 2166558239 is about 46546.3020980185. The cubic root of 2166558239 is about 1293.9677604808.

The spelling of 2166558239 in words is "two billion, one hundred sixty-six million, five hundred fifty-eight thousand, two hundred thirty-nine".