26665780000 has 60 divisors (see below), whose sum is σ = 65601867870. Its totient is φ = 10666304000.

The previous prime is 26665779991. The next prime is 26665780013. The reversal of 26665780000 is 8756662.

It can be written as a sum of positive squares in 5 ways, for example, as 1228081936 + 25437698064 = 35044^2 + 159492^2 .

It is a super-2 number, since 2×26665780000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 646645 + ... + 686644.

Almost surely, 2^26665780000 is an apocalyptic number.

26665780000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26665780000 is an abundant number, since it is smaller than the sum of its proper divisors (38936087870).

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

26665780000 is an equidigital number, since it uses as much as digits as its factorization.

26665780000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333319 (or 1333296 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 26665780000 in words is "twenty-six billion, six hundred sixty-five million, seven hundred eighty thousand".