26662208640 has 256 divisors, whose sum is σ = 86302869120. Its totient is φ = 7000653824.

The previous prime is 26662208633. The next prime is 26662208653. The reversal of 26662208640 is 4680226662.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 26662208592 and 26662208601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47867242 + ... + 47867798.

Almost surely, 2^26662208640 is an apocalyptic number.

26662208640 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 26662208640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43151434560).

26662208640 is an abundant number, since it is smaller than the sum of its proper divisors (59640660480).

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

26662208640 is a wasteful number, since it uses less digits than its factorization.

26662208640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 26662208640 in words is "twenty-six billion, six hundred sixty-two million, two hundred eight thousand, six hundred forty".