64810705 has 8 divisors (see below), whose sum is σ = 77819112. Its totient is φ = 51817728.

The previous prime is 64810703. The next prime is 64810723. The reversal of 64810705 is 50701846.

It can be written as a sum of positive squares in 4 ways, for example, as 21790224 + 43020481 = 4668^2 + 6559^2 .

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 64810705 - 2¹ = 64810703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64810703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9769 + ... + 15001.

It is an arithmetic number, because the mean of its divisors is an integer number (9727389).

Almost surely, 2^64810705 is an apocalyptic number.

It is an amenable number.

64810705 is a deficient number, since it is larger than the sum of its proper divisors (13008407).

64810705 is a wasteful number, since it uses less digits than its factorization.

64810705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7715.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 64810705 is about 8050.5096111985. The cubic root of 64810705 is about 401.6818869788.

The spelling of 64810705 in words is "sixty-four million, eight hundred ten thousand, seven hundred five".