66670800808138 has 8 divisors (see below), whose sum is σ = 100007317584288. Its totient is φ = 33335028280044.

The previous prime is 66670800808099. The next prime is 66670800808163. The reversal of 66670800808138 is 83180800807666.

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, 185838006 + ... + 186196417.

It is an arithmetic number, because the mean of its divisors is an integer number (12500914698036).

Almost surely, 2^{66670800808138} is an apocalyptic number.

66670800808138 is a deficient number, since it is larger than the sum of its proper divisors (33336516776150).

66670800808138 is a wasteful number, since it uses less digits than its factorization.

66670800808138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372124028.

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 66670800808138 in words is "sixty-six trillion, six hundred seventy billion, eight hundred million, eight hundred eight thousand, one hundred thirty-eight".