64654717 has 4 divisors (see below), whose sum is σ = 66884220. Its totient is φ = 62425216.

The previous prime is 64654699. The next prime is 64654721. The reversal of 64654717 is 71745646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36554116 + 28100601 = 6046^2 + 5301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64654717 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64654717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64654787) 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 3 ways as a sum of consecutive naturals, for example, 1114708 + ... + 1114765.

It is an arithmetic number, because the mean of its divisors is an integer number (16721055).

Almost surely, 2^64654717 is an apocalyptic number.

It is an amenable number.

64654717 is a deficient number, since it is larger than the sum of its proper divisors (2229503).

64654717 is a wasteful number, since it uses less digits than its factorization.

64654717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229502.

The product of its digits is 141120, while the sum is 40.

The square root of 64654717 is about 8040.8156924531. The cubic root of 64654717 is about 401.3593688079.

The spelling of 64654717 in words is "sixty-four million, six hundred fifty-four thousand, seven hundred seventeen".