2660195638 has 16 divisors (see below), whose sum is σ = 4030916400. Its totient is φ = 1316618656.

The previous prime is 2660195633. The next prime is 2660195641. The reversal of 2660195638 is 8365910662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660195633) 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 7 ways as a sum of consecutive naturals, for example, 72081 + ... + 102547.

It is an arithmetic number, because the mean of its divisors is an integer number (251932275).

Almost surely, 2^2660195638 is an apocalyptic number.

2660195638 is a deficient number, since it is larger than the sum of its proper divisors (1370720762).

2660195638 is a wasteful number, since it uses less digits than its factorization.

2660195638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30911.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 2660195638 is about 51577.0844270980. The cubic root of 2660195638 is about 1385.5999499943.

The spelling of 2660195638 in words is "two billion, six hundred sixty million, one hundred ninety-five thousand, six hundred thirty-eight".