166328567 has 4 divisors (see below), whose sum is σ = 166458696. Its totient is φ = 166198440.

The previous prime is 166328563. The next prime is 166328573. The reversal of 166328567 is 765823661.

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 166328567 - 2² = 166328563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166328563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63128 + ... + 65709.

It is an arithmetic number, because the mean of its divisors is an integer number (41614674).

Almost surely, 2^166328567 is an apocalyptic number.

166328567 is a deficient number, since it is larger than the sum of its proper divisors (130129).

166328567 is a wasteful number, since it uses less digits than its factorization.

166328567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130128.

The product of its digits is 362880, while the sum is 44.

The square root of 166328567 is about 12896.8432959387. The cubic root of 166328567 is about 549.9488293991.

The spelling of 166328567 in words is "one hundred sixty-six million, three hundred twenty-eight thousand, five hundred sixty-seven".