26666813952 has 320 divisors, whose sum is σ = 81691378560. Its totient is φ = 8583708672.

The previous prime is 26666813917. The next prime is 26666813993. The reversal of 26666813952 is 25931866662.

It is a super-2 number, since 2×26666813952² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67170618 + ... + 67171014.

It is an arithmetic number, because the mean of its divisors is an integer number (255285558).

Almost surely, 2^26666813952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26666813952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40845689280).

26666813952 is an abundant number, since it is smaller than the sum of its proper divisors (55024564608).

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

26666813952 is a wasteful number, since it uses less digits than its factorization.

26666813952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 558 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 26666813952 in words is "twenty-six billion, six hundred sixty-six million, eight hundred thirteen thousand, nine hundred fifty-two".