66933801874 has 4 divisors (see below), whose sum is σ = 100400702814. Its totient is φ = 33466900936.

The previous prime is 66933801859. The next prime is 66933801887. The reversal of 66933801874 is 47810833966.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64477905625 + 2455896249 = 253925^2 + 49557^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16733450467 + ... + 16733450470.

Almost surely, 2^66933801874 is an apocalyptic number.

66933801874 is a deficient number, since it is larger than the sum of its proper divisors (33466900940).

66933801874 is a wasteful number, since it uses less digits than its factorization.

66933801874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33466900939.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 66933801874 in words is "sixty-six billion, nine hundred thirty-three million, eight hundred one thousand, eight hundred seventy-four".