66539324700 has 54 divisors (see below), whose sum is σ = 208563819464. Its totient is φ = 17743819680.

The previous prime is 66539324693. The next prime is 66539324723. The reversal of 66539324700 is 742393566.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 36965392 + ... + 36967191.

Almost surely, 2^66539324700 is an apocalyptic number.

66539324700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66539324700 is an abundant number, since it is smaller than the sum of its proper divisors (142024494764).

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

66539324700 is a wasteful number, since it uses less digits than its factorization.

66539324700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73932603 (or 73932593 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 66539324700 in words is "sixty-six billion, five hundred thirty-nine million, three hundred twenty-four thousand, seven hundred".