75820565 has 8 divisors (see below), whose sum is σ = 91031640. Its totient is φ = 60625152.

The previous prime is 75820559. The next prime is 75820571. The reversal of 75820565 is 56502857.

It is an interprime number because it is at equal distance from previous prime (75820559) and next prime (75820571).

It can be written as a sum of positive squares in 4 ways, for example, as 790321 + 75030244 = 889^2 + 8662^2 .

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 75820565 - 2¹⁴ = 75804181 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15497 + ... + 19793.

It is an arithmetic number, because the mean of its divisors is an integer number (11378955).

Almost surely, 2^75820565 is an apocalyptic number.

It is an amenable number.

75820565 is a deficient number, since it is larger than the sum of its proper divisors (15211075).

75820565 is a wasteful number, since it uses less digits than its factorization.

75820565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7831.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 75820565 is about 8707.5005024404. The cubic root of 75820565 is about 423.2487382717.

The spelling of 75820565 in words is "seventy-five million, eight hundred twenty thousand, five hundred sixty-five".