66512179806 has 16 divisors (see below), whose sum is σ = 133518877200. Its totient is φ = 22088307008.

The previous prime is 66512179763. The next prime is 66512179813. The reversal of 66512179806 is 60897121566.

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 7 ways as a sum of consecutive naturals, for example, 20603151 + ... + 20606378.

It is an arithmetic number, because the mean of its divisors is an integer number (8344929825).

Almost surely, 2^66512179806 is an apocalyptic number.

66512179806 is an abundant number, since it is smaller than the sum of its proper divisors (67006697394).

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

66512179806 is a wasteful number, since it uses less digits than its factorization.

66512179806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41209803.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 66512179806 in words is "sixty-six billion, five hundred twelve million, one hundred seventy-nine thousand, eight hundred six".