166034685218 has 4 divisors (see below), whose sum is σ = 249052027830. Its totient is φ = 83017342608.

The previous prime is 166034685209. The next prime is 166034685221. The reversal of 166034685218 is 812586430661.

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., 139317802009 + 26716883209 = 373253^2 + 163453^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41508671303 + ... + 41508671306.

Almost surely, 2^166034685218 is an apocalyptic number.

166034685218 is a deficient number, since it is larger than the sum of its proper divisors (83017342612).

166034685218 is an equidigital number, since it uses as much as digits as its factorization.

166034685218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83017342611.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 166034685218 in words is "one hundred sixty-six billion, thirty-four million, six hundred eighty-five thousand, two hundred eighteen".