65535660 has 72 divisors (see below), whose sum is σ = 199451616. Its totient is φ = 17418240.

The previous prime is 65535649. The next prime is 65535667. The reversal of 65535660 is 6653556.

It is a happy number.

65535660 is a `hidden beast` number, since 65 + 535 + 6 + 60 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (65535667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103545 + ... + 104175.

Almost surely, 2^65535660 is an apocalyptic number.

65535660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65535660 is an abundant number, since it is smaller than the sum of its proper divisors (133915956).

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

65535660 is a wasteful number, since it uses less digits than its factorization.

65535660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 65535660 is about 8095.4098105037. The cubic root of 65535660 is about 403.1740387432.

It can be divided in two parts, 655 and 35660, that added together give a triangular number (36315 = T₂₆₉).

The spelling of 65535660 in words is "sixty-five million, five hundred thirty-five thousand, six hundred sixty".