666520362040001 has 16 divisors (see below), whose sum is σ = 769308785414400. Its totient is φ = 565632693286848.

The previous prime is 666520362039997. The next prime is 666520362040129. The reversal of 666520362040001 is 100040263025666.

It is a happy number.

666520362040001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 666520362040001 - 2² = 666520362039997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666520362540001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330135470 + ... + 332148263.

It is an arithmetic number, because the mean of its divisors is an integer number (48081799088400).

Almost surely, 2^{666520362040001} is an apocalyptic number.

It is an amenable number.

666520362040001 is a deficient number, since it is larger than the sum of its proper divisors (102788423374399).

666520362040001 is a wasteful number, since it uses less digits than its factorization.

666520362040001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662285168.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 666520362040001 in words is "six hundred sixty-six trillion, five hundred twenty billion, three hundred sixty-two million, forty thousand, one".