166873949 has 8 divisors (see below), whose sum is σ = 182275392. Its totient is φ = 151511040.

The previous prime is 166873939. The next prime is 166873951. The reversal of 166873949 is 949378661.

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

It is a cyclic number.

It is not a de Polignac number, because 166873949 - 2⁴ = 166873933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166873949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166873909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164 + ... + 18269.

It is an arithmetic number, because the mean of its divisors is an integer number (22784424).

Almost surely, 2^166873949 is an apocalyptic number.

It is an amenable number.

166873949 is a deficient number, since it is larger than the sum of its proper divisors (15401443).

166873949 is a wasteful number, since it uses less digits than its factorization.

166873949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19267.

The product of its digits is 1959552, while the sum is 53.

The square root of 166873949 is about 12917.9700030616. The cubic root of 166873949 is about 550.5492573623.

The spelling of 166873949 in words is "one hundred sixty-six million, eight hundred seventy-three thousand, nine hundred forty-nine".