26647236660 has 288 divisors, whose sum is σ = 86865512832. Its totient is φ = 6051594240.

The previous prime is 26647236659. The next prime is 26647236667. The reversal of 26647236660 is 6663274662.

It is a happy number.

It is a super-2 number, since 2×26647236660² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26647236667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23110644 + ... + 23111796.

It is an arithmetic number, because the mean of its divisors is an integer number (301616364).

Almost surely, 2^26647236660 is an apocalyptic number.

26647236660 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 26647236660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43432756416).

26647236660 is an abundant number, since it is smaller than the sum of its proper divisors (60218276172).

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

26647236660 is a wasteful number, since it uses less digits than its factorization.

26647236660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 48.

The spelling of 26647236660 in words is "twenty-six billion, six hundred forty-seven million, two hundred thirty-six thousand, six hundred sixty".