66823393682 has 8 divisors (see below), whose sum is σ = 100237869900. Its totient is φ = 33410770384.

The previous prime is 66823393631. The next prime is 66823393691. The reversal of 66823393682 is 28639332866.

It can be written as a sum of positive squares in 2 ways, for example, as 57599520001 + 9223873681 = 239999^2 + 96041^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 369257 + ... + 519612.

Almost surely, 2^66823393682 is an apocalyptic number.

66823393682 is a deficient number, since it is larger than the sum of its proper divisors (33414476218).

66823393682 is a wasteful number, since it uses less digits than its factorization.

66823393682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926460.

The product of its digits is 13436928, while the sum is 56.

The spelling of 66823393682 in words is "sixty-six billion, eight hundred twenty-three million, three hundred ninety-three thousand, six hundred eighty-two".