26667335780 has 12 divisors (see below), whose sum is σ = 56001405180. Its totient is φ = 10666934304.

The previous prime is 26667335777. The next prime is 26667335797. The reversal of 26667335780 is 8753376662.

It can be written as a sum of positive squares in 2 ways, for example, as 8121253924 + 18546081856 = 90118^2 + 136184^2 .

It is a super-2 number, since 2×26667335780² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 666683375 + ... + 666683414.

It is an arithmetic number, because the mean of its divisors is an integer number (4666783765).

Almost surely, 2^26667335780 is an apocalyptic number.

26667335780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26667335780 is an abundant number, since it is smaller than the sum of its proper divisors (29334069400).

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

26667335780 is a wasteful number, since it uses less digits than its factorization.

26667335780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333366798 (or 1333366796 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 26667335780 in words is "twenty-six billion, six hundred sixty-seven million, three hundred thirty-five thousand, seven hundred eighty".