66066666064 has 40 divisors (see below), whose sum is σ = 146318938560. Its totient is φ = 28308776448.

The previous prime is 66066666023. The next prime is 66066666067. The reversal of 66066666064 is 46066666066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66066666067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549327 + ... + 658705.

It is an arithmetic number, because the mean of its divisors is an integer number (3657973464).

Almost surely, 2^66066666064 is an apocalyptic number.

It is an amenable number.

66066666064 is an abundant number, since it is smaller than the sum of its proper divisors (80252272496).

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

66066666064 is a wasteful number, since it uses less digits than its factorization.

66066666064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114787 (or 114781 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 52.

The spelling of 66066666064 in words is "sixty-six billion, sixty-six million, six hundred sixty-six thousand, sixty-four".