166339918 has 4 divisors (see below), whose sum is σ = 249509880. Its totient is φ = 83169958.

The previous prime is 166339907. The next prime is 166339949. The reversal of 166339918 is 819933661.

166339918 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.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41584978 + ... + 41584981.

It is an arithmetic number, because the mean of its divisors is an integer number (62377470).

Almost surely, 2^166339918 is an apocalyptic number.

166339918 is a deficient number, since it is larger than the sum of its proper divisors (83169962).

166339918 is an equidigital number, since it uses as much as digits as its factorization.

166339918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83169961.

The product of its digits is 209952, while the sum is 46.

The square root of 166339918 is about 12897.2833573586. The cubic root of 166339918 is about 549.9613394313.

The spelling of 166339918 in words is "one hundred sixty-six million, three hundred thirty-nine thousand, nine hundred eighteen".