666026112705340 has 192 divisors, whose sum is σ = 1483841411619840. Its totient is φ = 250412068270080.

The previous prime is 666026112705337. The next prime is 666026112705409. The reversal of 666026112705340 is 43507211620666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55303997359 + ... + 55304009401.

It is an arithmetic number, because the mean of its divisors is an integer number (7728340685520).

Almost surely, 2^{666026112705340} 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 666026112705340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741920705809920).

666026112705340 is an abundant number, since it is smaller than the sum of its proper divisors (817815298914500).

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

666026112705340 is a wasteful number, since it uses less digits than its factorization.

666026112705340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14052 (or 14050 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 666026112705340 in words is "six hundred sixty-six trillion, twenty-six billion, one hundred twelve million, seven hundred five thousand, three hundred forty".