66982779518 has 8 divisors (see below), whose sum is σ = 100979065200. Its totient is φ = 33323091120.

The previous prime is 66982779491. The next prime is 66982779529. The reversal of 66982779518 is 81597728966.

It is a happy number.

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, 84148823 + ... + 84149618.

It is an arithmetic number, because the mean of its divisors is an integer number (12622383150).

Almost surely, 2^66982779518 is an apocalyptic number.

66982779518 is a deficient number, since it is larger than the sum of its proper divisors (33996285682).

66982779518 is a wasteful number, since it uses less digits than its factorization.

66982779518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168298642.

The product of its digits is 91445760, while the sum is 68.

The spelling of 66982779518 in words is "sixty-six billion, nine hundred eighty-two million, seven hundred seventy-nine thousand, five hundred eighteen".