166507017 has 4 divisors (see below), whose sum is σ = 222009360. Its totient is φ = 111004676.

The previous prime is 166507001. The next prime is 166507031. The reversal of 166507017 is 710705661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 710705661 = 3 ⋅236901887.

It is a cyclic number.

It is not a de Polignac number, because 166507017 - 2⁴ = 166507001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166507037) 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, 27751167 + ... + 27751172.

It is an arithmetic number, because the mean of its divisors is an integer number (55502340).

Almost surely, 2^166507017 is an apocalyptic number.

It is an amenable number.

166507017 is a deficient number, since it is larger than the sum of its proper divisors (55502343).

166507017 is an equidigital number, since it uses as much as digits as its factorization.

166507017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55502342.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 166507017 is about 12903.7598009262. The cubic root of 166507017 is about 550.1454348180.

The spelling of 166507017 in words is "one hundred sixty-six million, five hundred seven thousand, seventeen".