65544666 has 32 divisors (see below), whose sum is σ = 143294400. Its totient is φ = 19822080.

The previous prime is 65544659. The next prime is 65544701. The reversal of 65544666 is 66644556.

It is a happy number.

65544666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65544666² = 8592206482103112, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 60780 + ... + 61848.

It is an arithmetic number, because the mean of its divisors is an integer number (4477950).

Almost surely, 2^65544666 is an apocalyptic number.

65544666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

65544666 is an abundant number, since it is smaller than the sum of its proper divisors (77749734).

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

65544666 is a wasteful number, since it uses less digits than its factorization.

65544666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014.

The product of its digits is 518400, while the sum is 42.

The square root of 65544666 is about 8095.9660325374. The cubic root of 65544666 is about 403.1925061399.

The spelling of 65544666 in words is "sixty-five million, five hundred forty-four thousand, six hundred sixty-six".