26644666240680 has 64 divisors (see below), whose sum is σ = 80118603956160. Its totient is φ = 7088834976768.

The previous prime is 26644666240651. The next prime is 26644666240739. The reversal of 26644666240680 is 8604266644662.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256343982 + ... + 256447901.

It is an arithmetic number, because the mean of its divisors is an integer number (1251853186815).

Almost surely, 2^{26644666240680} is an apocalyptic number.

26644666240680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26644666240680 is an abundant number, since it is smaller than the sum of its proper divisors (53473937715480).

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

26644666240680 is a wasteful number, since it uses less digits than its factorization.

26644666240680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512792330 (or 512792326 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 60.

The spelling of 26644666240680 in words is "twenty-six trillion, six hundred forty-four billion, six hundred sixty-six million, two hundred forty thousand, six hundred eighty".