66736733673706 has 16 divisors (see below), whose sum is σ = 101815020765000. Its totient is φ = 32802727817728.

The previous prime is 66736733673689. The next prime is 66736733673721. The reversal of 66736733673706 is 60737633763766.

It can be written as a sum of positive squares in 4 ways, for example, as 66724310565025 + 12423108681 = 8168495^2 + 111459^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1083568831 + ... + 1083630418.

Almost surely, 2^{66736733673706} is an apocalyptic number.

66736733673706 is a deficient number, since it is larger than the sum of its proper divisors (35078287091294).

66736733673706 is a wasteful number, since it uses less digits than its factorization.

66736733673706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167199513.

The product of its (nonzero) digits is 1512284256, while the sum is 70.

The spelling of 66736733673706 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred thirty-three million, six hundred seventy-three thousand, seven hundred six".