166545567 has 12 divisors (see below), whose sum is σ = 246433824. Its totient is φ = 108322080.

The previous prime is 166545563. The next prime is 166545571. The reversal of 166545567 is 765545661.

It is an interprime number because it is at equal distance from previous prime (166545563) and next prime (166545571).

It is not a de Polignac number, because 166545567 - 2² = 166545563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166545563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225303 + ... + 226040.

It is an arithmetic number, because the mean of its divisors is an integer number (20536152).

Almost surely, 2^166545567 is an apocalyptic number.

166545567 is a deficient number, since it is larger than the sum of its proper divisors (79888257).

166545567 is a wasteful number, since it uses less digits than its factorization.

166545567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451390 (or 451387 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 166545567 is about 12905.2534651591. The cubic root of 166545567 is about 550.1878884242.

The spelling of 166545567 in words is "one hundred sixty-six million, five hundred forty-five thousand, five hundred sixty-seven".