65620540 has 24 divisors (see below), whose sum is σ = 138655440. Its totient is φ = 26085888.

The previous prime is 65620531. The next prime is 65620553. The reversal of 65620540 is 4502656.

It is a junction number, because it is equal to n+sod(n) for n = 65620499 and 65620508.

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, 6805 + ... + 13324.

It is an arithmetic number, because the mean of its divisors is an integer number (5777310).

Almost surely, 2^65620540 is an apocalyptic number.

It is an amenable number.

65620540 is an abundant number, since it is smaller than the sum of its proper divisors (73034900).

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

65620540 is a wasteful number, since it uses less digits than its factorization.

65620540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20301 (or 20299 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 65620540 is about 8100.6505911562. The cubic root of 65620540 is about 403.3480236588.

The spelling of 65620540 in words is "sixty-five million, six hundred twenty thousand, five hundred forty".