162666545 has 4 divisors (see below), whose sum is σ = 195199860. Its totient is φ = 130133232.

The previous prime is 162666529. The next prime is 162666547. The reversal of 162666545 is 545666261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545666261 = 7 ⋅77952323.

It can be written as a sum of positive squares in 2 ways, for example, as 88981489 + 73685056 = 9433^2 + 8584^2 .

It is a cyclic number.

It is not a de Polignac number, because 162666545 - 2⁴ = 162666529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (162666547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16266650 + ... + 16266659.

It is an arithmetic number, because the mean of its divisors is an integer number (48799965).

Almost surely, 2^162666545 is an apocalyptic number.

It is an amenable number.

162666545 is a deficient number, since it is larger than the sum of its proper divisors (32533315).

162666545 is an equidigital number, since it uses as much as digits as its factorization.

162666545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32533314.

The product of its digits is 259200, while the sum is 41.

The square root of 162666545 is about 12754.0795434245. The cubic root of 162666545 is about 545.8828045728.

The spelling of 162666545 in words is "one hundred sixty-two million, six hundred sixty-six thousand, five hundred forty-five".