65506166 has 32 divisors (see below), whose sum is σ = 110246400. Its totient is φ = 28939680.

The previous prime is 65506163. The next prime is 65506171. The reversal of 65506166 is 66160556.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65506163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141251 + ... + 141713.

It is an arithmetic number, because the mean of its divisors is an integer number (3445200).

Almost surely, 2^65506166 is an apocalyptic number.

65506166 is a deficient number, since it is larger than the sum of its proper divisors (44740234).

65506166 is a wasteful number, since it uses less digits than its factorization.

65506166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 65506166 is about 8093.5879559068. The cubic root of 65506166 is about 403.1135475063.

The spelling of 65506166 in words is "sixty-five million, five hundred six thousand, one hundred sixty-six".