65501660 has 24 divisors (see below), whose sum is σ = 157204320. Its totient is φ = 22457664.

The previous prime is 65501651. The next prime is 65501671. The reversal of 65501660 is 6610556.

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, 233795 + ... + 234074.

It is an arithmetic number, because the mean of its divisors is an integer number (6550180).

Almost surely, 2^65501660 is an apocalyptic number.

It is an amenable number.

65501660 is an abundant number, since it is smaller than the sum of its proper divisors (91702660).

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

65501660 is a wasteful number, since it uses less digits than its factorization.

65501660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467885 (or 467883 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 65501660 is about 8093.3095826120. The cubic root of 65501660 is about 403.1043042477.

The spelling of 65501660 in words is "sixty-five million, five hundred one thousand, six hundred sixty".