65065720 has 32 divisors (see below), whose sum is σ = 146966400. Its totient is φ = 25925248.

The previous prime is 65065717. The next prime is 65065727. The reversal of 65065720 is 2756056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65065727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7737 + ... + 13783.

It is an arithmetic number, because the mean of its divisors is an integer number (4592700).

Almost surely, 2^65065720 is an apocalyptic number.

It is an amenable number.

65065720 is an abundant number, since it is smaller than the sum of its proper divisors (81900680).

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

65065720 is a wasteful number, since it uses less digits than its factorization.

65065720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6327 (or 6323 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 65065720 is about 8066.3324999655. The cubic root of 65065720 is about 402.2080389822.

The spelling of 65065720 in words is "sixty-five million, sixty-five thousand, seven hundred twenty".