166819794 has 16 divisors (see below), whose sum is σ = 333771840. Its totient is φ = 55584560.

The previous prime is 166819789. The next prime is 166819799. The reversal of 166819794 is 497918661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (166819789) and next prime (166819799).

It is not an unprimeable number, because it can be changed into a prime (166819799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19912 + ... + 27020.

It is an arithmetic number, because the mean of its divisors is an integer number (20860740).

Almost surely, 2^166819794 is an apocalyptic number.

166819794 is an abundant number, since it is smaller than the sum of its proper divisors (166952046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166819794 is a wasteful number, since it uses less digits than its factorization.

166819794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11025.

The product of its digits is 653184, while the sum is 51.

The square root of 166819794 is about 12915.8737218974. The cubic root of 166819794 is about 550.4896949979.

The spelling of 166819794 in words is "one hundred sixty-six million, eight hundred nineteen thousand, seven hundred ninety-four".