166562061 has 4 divisors (see below), whose sum is σ = 222082752. Its totient is φ = 111041372.

The previous prime is 166562023. The next prime is 166562087. The reversal of 166562061 is 160265661.

166562061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 160265661 = 3 ⋅53421887.

It is a cyclic number.

It is not a de Polignac number, because 166562061 - 2¹⁰ = 166561037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166562161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27760341 + ... + 27760346.

It is an arithmetic number, because the mean of its divisors is an integer number (55520688).

Almost surely, 2^166562061 is an apocalyptic number.

It is an amenable number.

166562061 is a deficient number, since it is larger than the sum of its proper divisors (55520691).

166562061 is an equidigital number, since it uses as much as digits as its factorization.

166562061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55520690.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 166562061 is about 12905.8924914165. The cubic root of 166562061 is about 550.2060506198.

The spelling of 166562061 in words is "one hundred sixty-six million, five hundred sixty-two thousand, sixty-one".