26840611660 has 24 divisors (see below), whose sum is σ = 56613599280. Its totient is φ = 10688946624.

The previous prime is 26840611643. The next prime is 26840611667. The reversal of 26840611660 is 6611604862.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26840611667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2951475 + ... + 2960554.

It is an arithmetic number, because the mean of its divisors is an integer number (2358899970).

Almost surely, 2^26840611660 is an apocalyptic number.

26840611660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26840611660 is an abundant number, since it is smaller than the sum of its proper divisors (29772987620).

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

26840611660 is a wasteful number, since it uses less digits than its factorization.

26840611660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5912265 (or 5912263 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 26840611660 in words is "twenty-six billion, eight hundred forty million, six hundred eleven thousand, six hundred sixty".