65724961 has 8 divisors (see below), whose sum is σ = 69410880. Its totient is φ = 62108112.

The previous prime is 65724959. The next prime is 65724973. The reversal of 65724961 is 16942756.

65724961 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 65724961 - 2¹ = 65724959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65724931) by changing a digit.

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, 15306 + ... + 19123.

It is an arithmetic number, because the mean of its divisors is an integer number (8676360).

Almost surely, 2^65724961 is an apocalyptic number.

It is an amenable number.

65724961 is a deficient number, since it is larger than the sum of its proper divisors (3685919).

65724961 is a wasteful number, since it uses less digits than its factorization.

65724961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34535.

The product of its digits is 90720, while the sum is 40.

The square root of 65724961 is about 8107.0932522082. The cubic root of 65724961 is about 403.5618575342.

The spelling of 65724961 in words is "sixty-five million, seven hundred twenty-four thousand, nine hundred sixty-one".