66625671166 has 8 divisors (see below), whose sum is σ = 99939677760. Its totient is φ = 33312445248.

The previous prime is 66625671163. The next prime is 66625671209. The reversal of 66625671166 is 66117652666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66625671163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119950 + ... + 384238.

It is an arithmetic number, because the mean of its divisors is an integer number (12492459720).

Almost surely, 2^66625671166 is an apocalyptic number.

66625671166 is a deficient number, since it is larger than the sum of its proper divisors (33314006594).

66625671166 is a wasteful number, since it uses less digits than its factorization.

66625671166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390338.

The product of its digits is 3265920, while the sum is 52.

The spelling of 66625671166 in words is "sixty-six billion, six hundred twenty-five million, six hundred seventy-one thousand, one hundred sixty-six".