166705738 has 8 divisors (see below), whose sum is σ = 250135488. Its totient is φ = 83327244.

The previous prime is 166705733. The next prime is 166705789. The reversal of 166705738 is 837507661.

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

It is a junction number, because it is equal to n+sod(n) for n = 166705694 and 166705703.

It is not an unprimeable number, because it can be changed into a prime (166705733) 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, 3256 + ... + 18547.

It is an arithmetic number, because the mean of its divisors is an integer number (31266936).

Almost surely, 2^166705738 is an apocalyptic number.

166705738 is a deficient number, since it is larger than the sum of its proper divisors (83429750).

166705738 is a wasteful number, since it uses less digits than its factorization.

166705738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25628.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 166705738 is about 12911.4576249159. The cubic root of 166705738 is about 550.3642083559.

The spelling of 166705738 in words is "one hundred sixty-six million, seven hundred five thousand, seven hundred thirty-eight".