26664318720 has 720 divisors, whose sum is σ = 104540886912. Its totient is φ = 6449725440.

The previous prime is 26664318697. The next prime is 26664318727. The reversal of 26664318720 is 2781346662.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26664318727) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 98392185 + ... + 98392455.

Almost surely, 2^26664318720 is an apocalyptic number.

26664318720 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 26664318720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52270443456).

26664318720 is an abundant number, since it is smaller than the sum of its proper divisors (77876568192).

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

26664318720 is a wasteful number, since it uses less digits than its factorization.

26664318720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 26664318720 in words is "twenty-six billion, six hundred sixty-four million, three hundred eighteen thousand, seven hundred twenty".