65720307 has 8 divisors (see below), whose sum is σ = 87831184. Its totient is φ = 43711488.

The previous prime is 65720299. The next prime is 65720321. The reversal of 65720307 is 70302756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65720307 - 2³ = 65720299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65720327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23998 + ... + 26595.

It is an arithmetic number, because the mean of its divisors is an integer number (10978898).

Almost surely, 2^65720307 is an apocalyptic number.

65720307 is a deficient number, since it is larger than the sum of its proper divisors (22110877).

65720307 is a wasteful number, since it uses less digits than its factorization.

65720307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51029.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 65720307 is about 8106.8062145336. The cubic root of 65720307 is about 403.5523318726.

The spelling of 65720307 in words is "sixty-five million, seven hundred twenty thousand, three hundred seven".