66120140334666 has 64 divisors (see below), whose sum is σ = 147799820762496. Its totient is φ = 19545185817600.

The previous prime is 66120140334583. The next prime is 66120140334697. The reversal of 66120140334666 is 66643304102166.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19403800 + ... + 22555436.

It is an arithmetic number, because the mean of its divisors is an integer number (2309372199414).

Almost surely, 2^{66120140334666} is an apocalyptic number.

66120140334666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66120140334666 is an abundant number, since it is smaller than the sum of its proper divisors (81679680427830).

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

66120140334666 is a wasteful number, since it uses less digits than its factorization.

66120140334666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159447.

The product of its (nonzero) digits is 2239488, while the sum is 48.

The spelling of 66120140334666 in words is "sixty-six trillion, one hundred twenty billion, one hundred forty million, three hundred thirty-four thousand, six hundred sixty-six".