65404660 has 24 divisors (see below), whose sum is σ = 137871720. Its totient is φ = 26062464.

The previous prime is 65404639. The next prime is 65404667. The reversal of 65404660 is 6640456.

It can be written as a sum of positive squares in 4 ways, for example, as 3247204 + 62157456 = 1802^2 + 7884^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65404667) 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 7 ways as a sum of consecutive naturals, for example, 699 + ... + 11458.

It is an arithmetic number, because the mean of its divisors is an integer number (5744655).

Almost surely, 2^65404660 is an apocalyptic number.

It is an amenable number.

65404660 is an abundant number, since it is smaller than the sum of its proper divisors (72467060).

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

65404660 is a wasteful number, since it uses less digits than its factorization.

65404660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12435 (or 12433 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 65404660 is about 8087.3147583113. The cubic root of 65404660 is about 402.9052231112.

The spelling of 65404660 in words is "sixty-five million, four hundred four thousand, six hundred sixty".