166739942 has 8 divisors (see below), whose sum is σ = 250330296. Its totient is φ = 83296512.

The previous prime is 166739941. The next prime is 166739971. The reversal of 166739942 is 249937661.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166739941) 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 3 ways as a sum of consecutive naturals, for example, 33848 + ... + 38459.

It is an arithmetic number, because the mean of its divisors is an integer number (31291287).

Almost surely, 2^166739942 is an apocalyptic number.

166739942 is a deficient number, since it is larger than the sum of its proper divisors (83590354).

166739942 is a wasteful number, since it uses less digits than its factorization.

166739942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73462.

The product of its digits is 489888, while the sum is 47.

The square root of 166739942 is about 12912.7821169568. The cubic root of 166739942 is about 550.4018462726.

The spelling of 166739942 in words is "one hundred sixty-six million, seven hundred thirty-nine thousand, nine hundred forty-two".