65720345 has 8 divisors (see below), whose sum is σ = 79337664. Its totient is φ = 52260784.

The previous prime is 65720339. The next prime is 65720353. The reversal of 65720345 is 54302756.

65720345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 65720345 - 2⁴ = 65720329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38519 + ... + 40188.

It is an arithmetic number, because the mean of its divisors is an integer number (9917208).

Almost surely, 2^65720345 is an apocalyptic number.

It is an amenable number.

65720345 is a deficient number, since it is larger than the sum of its proper divisors (13617319).

65720345 is a wasteful number, since it uses less digits than its factorization.

65720345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78879.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 65720345 is about 8106.8085582429. The cubic root of 65720345 is about 403.5524096516.

The spelling of 65720345 in words is "sixty-five million, seven hundred twenty thousand, three hundred forty-five".