26665594368 has 160 divisors (see below), whose sum is σ = 81404742144. Its totient is φ = 7598333952.

The previous prime is 26665594367. The next prime is 26665594369. The reversal of 26665594368 is 86349556662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26665594367) and next prime (26665594369).

It is a super-2 number, since 2×26665594368² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26665594367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4265421 + ... + 4271667.

Almost surely, 2^26665594368 is an apocalyptic number.

26665594368 is a gapful number since it is divisible by the number (28) 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 26665594368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40702371072).

26665594368 is an abundant number, since it is smaller than the sum of its proper divisors (54739147776).

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

26665594368 is an equidigital number, since it uses as much as digits as its factorization.

26665594368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6672 (or 6656 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 60.

The spelling of 26665594368 in words is "twenty-six billion, six hundred sixty-five million, five hundred ninety-four thousand, three hundred sixty-eight".