75664717 has 4 divisors (see below), whose sum is σ = 75777820. Its totient is φ = 75551616.

The previous prime is 75664691. The next prime is 75664747. The reversal of 75664717 is 71746657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71746657 = 139 ⋅516163.

It can be written as a sum of positive squares in 2 ways, for example, as 40309801 + 35354916 = 6349^2 + 5946^2 .

It is a cyclic number.

It is not a de Polignac number, because 75664717 - 2¹⁵ = 75631949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75664747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55542 + ... + 56887.

It is an arithmetic number, because the mean of its divisors is an integer number (18944455).

Almost surely, 2^75664717 is an apocalyptic number.

It is an amenable number.

75664717 is a deficient number, since it is larger than the sum of its proper divisors (113103).

75664717 is a wasteful number, since it uses less digits than its factorization.

75664717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113102.

The product of its digits is 246960, while the sum is 43.

The square root of 75664717 is about 8698.5468326612. The cubic root of 75664717 is about 422.9585456044.

The spelling of 75664717 in words is "seventy-five million, six hundred sixty-four thousand, seven hundred seventeen".