166042323 has 6 divisors (see below), whose sum is σ = 239838924. Its totient is φ = 110694876.

The previous prime is 166042321. The next prime is 166042337. The reversal of 166042323 is 323240661.

166042323 is a `hidden beast` number, since 16 + 604 + 23 + 23 = 666.

It is not a de Polignac number, because 166042323 - 2¹ = 166042321 is a prime.

It is a super-3 number, since 3×166042323³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (166042321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9224565 + ... + 9224582.

It is an arithmetic number, because the mean of its divisors is an integer number (39973154).

Almost surely, 2^166042323 is an apocalyptic number.

166042323 is a deficient number, since it is larger than the sum of its proper divisors (73796601).

166042323 is a wasteful number, since it uses less digits than its factorization.

166042323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18449153 (or 18449150 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 166042323 is about 12885.7410729845. The cubic root of 166042323 is about 549.6331691651.

Adding to 166042323 its reverse (323240661), we get a palindrome (489282984).

The spelling of 166042323 in words is "one hundred sixty-six million, forty-two thousand, three hundred twenty-three".