166246917 has 4 divisors (see below), whose sum is σ = 221662560. Its totient is φ = 110831276.

The previous prime is 166246907. The next prime is 166246933. The reversal of 166246917 is 719642661.

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.

It is a cyclic number.

It is not a de Polignac number, because 166246917 - 2⁶ = 166246853 is a prime.

It is a super-4 number, since 4×166246917⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166246907) 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, 27707817 + ... + 27707822.

It is an arithmetic number, because the mean of its divisors is an integer number (55415640).

Almost surely, 2^166246917 is an apocalyptic number.

It is an amenable number.

166246917 is a deficient number, since it is larger than the sum of its proper divisors (55415643).

166246917 is an equidigital number, since it uses as much as digits as its factorization.

166246917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55415642.

The product of its digits is 108864, while the sum is 42.

The square root of 166246917 is about 12893.6774040613. The cubic root of 166246917 is about 549.8588254743.

The spelling of 166246917 in words is "one hundred sixty-six million, two hundred forty-six thousand, nine hundred seventeen".