65720733 has 16 divisors (see below), whose sum is σ = 94530240. Its totient is φ = 40374144.

The previous prime is 65720731. The next prime is 65720737. The reversal of 65720733 is 33702756.

It is not a de Polignac number, because 65720733 - 2¹ = 65720731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65720694 and 65720703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65720731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30510 + ... + 32592.

It is an arithmetic number, because the mean of its divisors is an integer number (5908140).

Almost surely, 2^65720733 is an apocalyptic number.

It is an amenable number.

65720733 is a deficient number, since it is larger than the sum of its proper divisors (28809507).

65720733 is a wasteful number, since it uses less digits than its factorization.

65720733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 26460, while the sum is 33.

The square root of 65720733 is about 8106.8324887098. The cubic root of 65720733 is about 403.5532038147.

The spelling of 65720733 in words is "sixty-five million, seven hundred twenty thousand, seven hundred thirty-three".