66666700740698 has 4 divisors (see below), whose sum is σ = 100000051111050. Its totient is φ = 33333350370348.

The previous prime is 66666700740697. The next prime is 66666700740727. The reversal of 66666700740698 is 89604700766666.

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., 37189543412329 + 29477157328369 = 6098323^2 + 5429287^2 .

It is not an unprimeable number, because it can be changed into a prime (66666700740697) by changing a digit.

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, 16666675185173 + ... + 16666675185176.

Almost surely, 2^{66666700740698} is an apocalyptic number.

66666700740698 is a deficient number, since it is larger than the sum of its proper divisors (33333350370352).

66666700740698 is a wasteful number, since it uses less digits than its factorization.

66666700740698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333350370351.

The product of its (nonzero) digits is 658409472, while the sum is 71.

The spelling of 66666700740698 in words is "sixty-six trillion, six hundred sixty-six billion, seven hundred million, seven hundred forty thousand, six hundred ninety-eight".