65166318 has 48 divisors (see below), whose sum is σ = 161980416. Its totient is φ = 18547920.

The previous prime is 65166313. The next prime is 65166319. The reversal of 65166318 is 81366156.

It is a happy number.

65166318 is a `hidden beast` number, since 6 + 5 + 16 + 631 + 8 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65166313) 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 23 ways as a sum of consecutive naturals, for example, 38355 + ... + 40017.

It is an arithmetic number, because the mean of its divisors is an integer number (3374592).

Almost surely, 2^65166318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65166318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80990208).

65166318 is an abundant number, since it is smaller than the sum of its proper divisors (96814098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65166318 is a wasteful number, since it uses less digits than its factorization.

65166318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989 (or 1986 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 65166318 is about 8072.5657631264. The cubic root of 65166318 is about 402.4152166369.

The spelling of 65166318 in words is "sixty-five million, one hundred sixty-six thousand, three hundred eighteen".