66188557334 has 32 divisors (see below), whose sum is σ = 104245989120. Its totient is φ = 31476350752.

The previous prime is 66188557321. The next prime is 66188557381. The reversal of 66188557334 is 43375588166.

66188557334 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66188557334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1650647 + ... + 1690269.

It is an arithmetic number, because the mean of its divisors is an integer number (3257687160).

Almost surely, 2^66188557334 is an apocalyptic number.

66188557334 is a deficient number, since it is larger than the sum of its proper divisors (38057431786).

66188557334 is a wasteful number, since it uses less digits than its factorization.

66188557334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40084.

The product of its digits is 14515200, while the sum is 56.

The spelling of 66188557334 in words is "sixty-six billion, one hundred eighty-eight million, five hundred fifty-seven thousand, three hundred thirty-four".