166916683442 has 4 divisors (see below), whose sum is σ = 250375025166. Its totient is φ = 83458341720.

The previous prime is 166916683441. The next prime is 166916683489. The reversal of 166916683442 is 244386619661.

166916683442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244386619661 = 157 ⋅1556602673.

It can be written as a sum of positive squares in only one way, i.e., 166267402081 + 649281361 = 407759^2 + 25481^2 .

It is a super-2 number, since 2×166916683442² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166916683441) by changing a digit.

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 as a sum of consecutive naturals, namely, 41729170859 + ... + 41729170862.

Almost surely, 2^166916683442 is an apocalyptic number.

166916683442 is a deficient number, since it is larger than the sum of its proper divisors (83458341724).

166916683442 is an equidigital number, since it uses as much as digits as its factorization.

166916683442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83458341723.

The product of its digits is 8957952, while the sum is 56.

The spelling of 166916683442 in words is "one hundred sixty-six billion, nine hundred sixteen million, six hundred eighty-three thousand, four hundred forty-two".