2659891968 has 54 divisors (see below), whose sum is σ = 7669130924. Its totient is φ = 886629888.

The previous prime is 2659891967. The next prime is 2659892033. The reversal of 2659891968 is 8691989562.

2659891968 is a `hidden beast` number, since 26 + 598 + 9 + 19 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (2659891963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 574930 + ... + 579537.

Almost surely, 2^2659891968 is an apocalyptic number.

It is an amenable number.

2659891968 is an abundant number, since it is smaller than the sum of its proper divisors (5009238956).

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

2659891968 is a wasteful number, since it uses less digits than its factorization.

2659891968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154489 (or 1154472 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The square root of 2659891968 is about 51574.1404969584. The cubic root of 2659891968 is about 1385.5472244049.

The spelling of 2659891968 in words is "two billion, six hundred fifty-nine million, eight hundred ninety-one thousand, nine hundred sixty-eight".