65821632 has 28 divisors (see below), whose sum is σ = 174153576. Its totient is φ = 21940480.

The previous prime is 65821621. The next prime is 65821633. The reversal of 65821632 is 23612856.

It is a junction number, because it is equal to n+sod(n) for n = 65821593 and 65821602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65821633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171219 + ... + 171602.

Almost surely, 2^65821632 is an apocalyptic number.

It is an amenable number.

65821632 is an abundant number, since it is smaller than the sum of its proper divisors (108331944).

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

65821632 is a wasteful number, since it uses less digits than its factorization.

65821632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342836 (or 342826 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 65821632 is about 8113.0531860700. The cubic root of 65821632 is about 403.7596191160.

The spelling of 65821632 in words is "sixty-five million, eight hundred twenty-one thousand, six hundred thirty-two".