166131347 has 4 divisors (see below), whose sum is σ = 166501800. Its totient is φ = 165760896.

The previous prime is 166131341. The next prime is 166131349. The reversal of 166131347 is 743131661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 743131661 = 211 ⋅3521951.

It is a cyclic number.

It is not a de Polignac number, because 166131347 - 2¹⁰ = 166130323 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (166131341) 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, 184553 + ... + 185450.

It is an arithmetic number, because the mean of its divisors is an integer number (41625450).

Almost surely, 2^166131347 is an apocalyptic number.

166131347 is a deficient number, since it is larger than the sum of its proper divisors (370453).

166131347 is an equidigital number, since it uses as much as digits as its factorization.

166131347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370452.

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

The square root of 166131347 is about 12889.1949709825. The cubic root of 166131347 is about 549.7313806737.

The spelling of 166131347 in words is "one hundred sixty-six million, one hundred thirty-one thousand, three hundred forty-seven".