2666689158 has 32 divisors (see below), whose sum is σ = 6154477056. Its totient is φ = 754512768.

The previous prime is 2666689153. The next prime is 2666689169. The reversal of 2666689158 is 8519866662.

It is a happy number.

It is a super-2 number, since 2×2666689158² = 14222462130789497928, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2666689098 and 2666689107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666689153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303891 + ... + 312542.

It is an arithmetic number, because the mean of its divisors is an integer number (192327408).

Almost surely, 2^2666689158 is an apocalyptic number.

2666689158 is an abundant number, since it is smaller than the sum of its proper divisors (3487787898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666689158 is a wasteful number, since it uses less digits than its factorization.

2666689158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616548.

The product of its digits is 7464960, while the sum is 57.

The square root of 2666689158 is about 51639.9957203716. The cubic root of 2666689158 is about 1386.7264473452.

The spelling of 2666689158 in words is "two billion, six hundred sixty-six million, six hundred eighty-nine thousand, one hundred fifty-eight".