66479681782 has 8 divisors (see below), whose sum is σ = 100133297352. Its totient is φ = 33101916000.

The previous prime is 66479681777. The next prime is 66479681831. The reversal of 66479681782 is 28718697466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68961844 + ... + 68962807.

It is an arithmetic number, because the mean of its divisors is an integer number (12516662169).

Almost surely, 2^66479681782 is an apocalyptic number.

66479681782 is a deficient number, since it is larger than the sum of its proper divisors (33653615570).

66479681782 is a wasteful number, since it uses less digits than its factorization.

66479681782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137924894.

The product of its digits is 48771072, while the sum is 64.

The spelling of 66479681782 in words is "sixty-six billion, four hundred seventy-nine million, six hundred eighty-one thousand, seven hundred eighty-two".