2666123607 has 32 divisors (see below), whose sum is σ = 4145541120. Its totient is φ = 1492508160.

The previous prime is 2666123599. The next prime is 2666123609. The reversal of 2666123607 is 7063216662.

It is not a de Polignac number, because 2666123607 - 2³ = 2666123599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666123609) 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 31 ways as a sum of consecutive naturals, for example, 979194 + ... + 981912.

It is an arithmetic number, because the mean of its divisors is an integer number (129548160).

Almost surely, 2^2666123607 is an apocalyptic number.

2666123607 is a deficient number, since it is larger than the sum of its proper divisors (1479417513).

2666123607 is a wasteful number, since it uses less digits than its factorization.

2666123607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 2666123607 is about 51634.5195290902. The cubic root of 2666123607 is about 1386.6284081749.

The spelling of 2666123607 in words is "two billion, six hundred sixty-six million, one hundred twenty-three thousand, six hundred seven".