166741331 has 4 divisors (see below), whose sum is σ = 168217032. Its totient is φ = 165265632.

The previous prime is 166741327. The next prime is 166741369. The reversal of 166741331 is 133147661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166741331 - 2² = 166741327 is a prime.

It is a super-3 number, since 3×166741331³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166741231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737681 + ... + 737906.

It is an arithmetic number, because the mean of its divisors is an integer number (42054258).

Almost surely, 2^166741331 is an apocalyptic number.

166741331 is a deficient number, since it is larger than the sum of its proper divisors (1475701).

166741331 is a wasteful number, since it uses less digits than its factorization.

166741331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475700.

The product of its digits is 9072, while the sum is 32.

The square root of 166741331 is about 12912.8359007617. The cubic root of 166741331 is about 550.4033746128.

Adding to 166741331 its reverse (133147661), we get a palindrome (299888992).

The spelling of 166741331 in words is "one hundred sixty-six million, seven hundred forty-one thousand, three hundred thirty-one".