66176993324208 has 160 divisors (see below), whose sum is σ = 185181368508864. Its totient is φ = 20243682902016.

The previous prime is 66176993324147. The next prime is 66176993324219. The reversal of 66176993324208 is 80242339967166.

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 31 ways as a sum of consecutive naturals, for example, 94592460 + ... + 95289492.

Almost surely, 2^{66176993324208} 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 66176993324208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92590684254432).

66176993324208 is an abundant number, since it is smaller than the sum of its proper divisors (119004375184656).

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

66176993324208 is a wasteful number, since it uses less digits than its factorization.

66176993324208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697943 (or 697937 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 66.

The spelling of 66176993324208 in words is "sixty-six trillion, one hundred seventy-six billion, nine hundred ninety-three million, three hundred twenty-four thousand, two hundred eight".