65545566 has 16 divisors (see below), whose sum is σ = 132390288. Its totient is φ = 21632000.

The previous prime is 65545559. The next prime is 65545609. The reversal of 65545566 is 66554556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53475 + ... + 54686.

It is an arithmetic number, because the mean of its divisors is an integer number (8274393).

Almost surely, 2^65545566 is an apocalyptic number.

65545566 is an abundant number, since it is smaller than the sum of its proper divisors (66844722).

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

65545566 is a wasteful number, since it uses less digits than its factorization.

65545566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108267.

The product of its digits is 540000, while the sum is 42.

The square root of 65545566 is about 8096.0216155838. The cubic root of 65545566 is about 403.1943515562.

The spelling of 65545566 in words is "sixty-five million, five hundred forty-five thousand, five hundred sixty-six".