64718065 has 8 divisors (see below), whose sum is σ = 82230120. Its totient is φ = 48728832.

The previous prime is 64718063. The next prime is 64718083. The reversal of 64718065 is 56081746.

64718065 = 5688² + 5689².

It can be written as a sum of positive squares in 4 ways, for example, as 32353344 + 32364721 = 5688^2 + 5689^2 .

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 64718065 - 2¹ = 64718063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64718063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380610 + ... + 380779.

It is an arithmetic number, because the mean of its divisors is an integer number (10278765).

Almost surely, 2^64718065 is an apocalyptic number.

64718065 is the 5689-th centered square number.

It is an amenable number.

64718065 is a deficient number, since it is larger than the sum of its proper divisors (17512055).

64718065 is a wasteful number, since it uses less digits than its factorization.

64718065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761411.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 64718065 is about 8044.7538806355. The cubic root of 64718065 is about 401.4904085586.

The spelling of 64718065 in words is "sixty-four million, seven hundred eighteen thousand, sixty-five".