65545560 has 96 divisors (see below), whose sum is σ = 214521840. Its totient is φ = 17356032.

The previous prime is 65545559. The next prime is 65545609. The reversal of 65545560 is 6554556.

It is a happy number.

65545560 is a `hidden beast` number, since 6 + 55 + 45 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58122 + ... + 59238.

Almost surely, 2^65545560 is an apocalyptic number.

65545560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65545560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107260920).

65545560 is an abundant number, since it is smaller than the sum of its proper divisors (148976280).

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

65545560 is a wasteful number, since it uses less digits than its factorization.

65545560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 65545560 is about 8096.0212450314. The cubic root of 65545560 is about 403.1943392535.

The spelling of 65545560 in words is "sixty-five million, five hundred forty-five thousand, five hundred sixty".