66000400426064 has 40 divisors (see below), whose sum is σ = 138481716915360. Its totient is φ = 30291546031488.

The previous prime is 66000400426063. The next prime is 66000400426073. The reversal of 66000400426064 is 46062400400066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000400426063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886302482 + ... + 886376945.

It is an arithmetic number, because the mean of its divisors is an integer number (3462042922884).

Almost surely, 2^{66000400426064} is an apocalyptic number.

It is an amenable number.

66000400426064 is an abundant number, since it is smaller than the sum of its proper divisors (72481316489296).

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

66000400426064 is a wasteful number, since it uses less digits than its factorization.

66000400426064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772679627 (or 1772679621 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 66000400426064 in words is "sixty-six trillion, four hundred million, four hundred twenty-six thousand, sixty-four".