2660198279 has 4 divisors (see below), whose sum is σ = 2660534760. Its totient is φ = 2659861800.

The previous prime is 2660198273. The next prime is 2660198291. The reversal of 2660198279 is 9728910662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2660198279 - 2²⁸ = 2391762823 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 (2660198273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156089 + ... + 172290.

It is an arithmetic number, because the mean of its divisors is an integer number (665133690).

Almost surely, 2^2660198279 is an apocalyptic number.

2660198279 is a deficient number, since it is larger than the sum of its proper divisors (336481).

2660198279 is an equidigital number, since it uses as much as digits as its factorization.

2660198279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336480.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 2660198279 is about 51577.1100295470. The cubic root of 2660198279 is about 1385.6004085280.

The spelling of 2660198279 in words is "two billion, six hundred sixty million, one hundred ninety-eight thousand, two hundred seventy-nine".