65541666 has 8 divisors (see below), whose sum is σ = 131083344. Its totient is φ = 21847220.

The previous prime is 65541661. The next prime is 65541667. The reversal of 65541666 is 66614556.

It is a sphenic number, since it is the product of 3 distinct primes.

65541666 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65541661) 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, 5461800 + ... + 5461811.

It is an arithmetic number, because the mean of its divisors is an integer number (16385418).

Almost surely, 2^65541666 is an apocalyptic number.

65541666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

65541666 is a wasteful number, since it uses less digits than its factorization.

65541666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10923616.

The product of its digits is 129600, while the sum is 39.

The square root of 65541666 is about 8095.7807529601. The cubic root of 65541666 is about 403.1863546300.

The spelling of 65541666 in words is "sixty-five million, five hundred forty-one thousand, six hundred sixty-six".