65720527 has 4 divisors (see below), whose sum is σ = 67840576. Its totient is φ = 63600480.

The previous prime is 65720519. The next prime is 65720549. The reversal of 65720527 is 72502756.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65720527 - 2³ = 65720519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65720492 and 65720501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65720587) 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, 1059978 + ... + 1060039.

It is an arithmetic number, because the mean of its divisors is an integer number (16960144).

Almost surely, 2^65720527 is an apocalyptic number.

65720527 is a deficient number, since it is larger than the sum of its proper divisors (2120049).

65720527 is a wasteful number, since it uses less digits than its factorization.

65720527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120048.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 65720527 is about 8106.8197833676. The cubic root of 65720527 is about 403.5527821718.

The spelling of 65720527 in words is "sixty-five million, seven hundred twenty thousand, five hundred twenty-seven".