2666663193 has 4 divisors (see below), whose sum is σ = 3555550928. Its totient is φ = 1777775460.

The previous prime is 2666663177. The next prime is 2666663261. The reversal of 2666663193 is 3913666662.

2666663193 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2666663193 - 2⁴ = 2666663177 is a prime.

It is a super-2 number, since 2×2666663193² = 14222185169801910498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666663893) 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, 444443863 + ... + 444443868.

It is an arithmetic number, because the mean of its divisors is an integer number (888887732).

Almost surely, 2^2666663193 is an apocalyptic number.

It is an amenable number.

2666663193 is a deficient number, since it is larger than the sum of its proper divisors (888887735).

2666663193 is an equidigital number, since it uses as much as digits as its factorization.

2666663193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888887734.

The product of its digits is 1259712, while the sum is 48.

The square root of 2666663193 is about 51639.7443157884. The cubic root of 2666663193 is about 1386.7219465745.

The spelling of 2666663193 in words is "two billion, six hundred sixty-six million, six hundred sixty-three thousand, one hundred ninety-three".