120166565 has 16 divisors (see below), whose sum is σ = 148523760. Its totient is φ = 93265920.

The previous prime is 120166561. The next prime is 120166567. The reversal of 120166565 is 565661021.

It can be written as a sum of positive squares in 8 ways, for example, as 8631844 + 111534721 = 2938^2 + 10561^2 .

It is not a de Polignac number, because 120166565 - 2² = 120166561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120166561) 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 15 ways as a sum of consecutive naturals, for example, 84581 + ... + 85989.

It is an arithmetic number, because the mean of its divisors is an integer number (9282735).

Almost surely, 2^120166565 is an apocalyptic number.

It is an amenable number.

120166565 is a deficient number, since it is larger than the sum of its proper divisors (28357195).

120166565 is a wasteful number, since it uses less digits than its factorization.

120166565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 120166565 is about 10962.0511310612. The cubic root of 120166565 is about 493.4705230319.

It can be divided in two parts, 12016 and 6565, that added together give a palindrome (18581).

The spelling of 120166565 in words is "one hundred twenty million, one hundred sixty-six thousand, five hundred sixty-five".