65632540 has 12 divisors (see below), whose sum is σ = 137828376. Its totient is φ = 26253008.

The previous prime is 65632537. The next prime is 65632571. The reversal of 65632540 is 4523656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640794 + ... + 1640833.

It is an arithmetic number, because the mean of its divisors is an integer number (11485698).

Almost surely, 2^65632540 is an apocalyptic number.

It is an amenable number.

65632540 is an abundant number, since it is smaller than the sum of its proper divisors (72195836).

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

65632540 is a wasteful number, since it uses less digits than its factorization.

65632540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3281636 (or 3281634 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 65632540 is about 8101.3912385466. The cubic root of 65632540 is about 403.3726088536.

The spelling of 65632540 in words is "sixty-five million, six hundred thirty-two thousand, five hundred forty".