166685016667 has 8 divisors (see below), whose sum is σ = 179533578224. Its totient is φ = 153840260448.

The previous prime is 166685016653. The next prime is 166685016703. The reversal of 166685016667 is 766610586661.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166685016667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166685016767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860028 + ... + 1035865.

It is an arithmetic number, because the mean of its divisors is an integer number (22441697278).

Almost surely, 2^166685016667 is an apocalyptic number.

166685016667 is a deficient number, since it is larger than the sum of its proper divisors (12848561557).

166685016667 is a wasteful number, since it uses less digits than its factorization.

166685016667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902669.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 166685016667 in words is "one hundred sixty-six billion, six hundred eighty-five million, sixteen thousand, six hundred sixty-seven".