26666500000 has 336 divisors, whose sum is σ = 79142736960. Its totient is φ = 8640000000.

The previous prime is 26666499991. The next prime is 26666500013. The reversal of 26666500000 is 566662.

It is a super-2 number, since 2×26666500000² (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 (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 66499800 + ... + 66500200.

It is an arithmetic number, because the mean of its divisors is an integer number (235543860).

Almost surely, 2^26666500000 is an apocalyptic number.

26666500000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26666500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39571368480).

26666500000 is an abundant number, since it is smaller than the sum of its proper divisors (52476236960).

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

26666500000 is an frugal number, since it uses more digits than its factorization.

26666500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

It can be divided in two parts, 266 and 66500000, that multiplied together give a square (17689000000 = 133000²).

The spelling of 26666500000 in words is "twenty-six billion, six hundred sixty-six million, five hundred thousand".