66704542545500 has 96 divisors (see below), whose sum is σ = 150940663997760. Its totient is φ = 25721685830400.

The previous prime is 66704542545493. The next prime is 66704542545539. The reversal of 66704542545500 is 554524540766.

66704542545500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5746274 + ... + 12900726.

It is an arithmetic number, because the mean of its divisors is an integer number (1572298583310).

Almost surely, 2^{66704542545500} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66704542545500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75470331998880).

66704542545500 is an abundant number, since it is smaller than the sum of its proper divisors (84236121452260).

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

66704542545500 is a wasteful number, since it uses less digits than its factorization.

66704542545500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7155144 (or 7155132 counting only the distinct ones).

The product of its (nonzero) digits is 20160000, while the sum is 53.

The spelling of 66704542545500 in words is "sixty-six trillion, seven hundred four billion, five hundred forty-two million, five hundred forty-five thousand, five hundred".