75665 has 8 divisors (see below), whose sum is σ = 93480. Its totient is φ = 58752.

The previous prime is 75659. The next prime is 75679. The reversal of 75665 is 56657.

It can be written as a sum of positive squares in 4 ways, for example, as 38416 + 37249 = 196^2 + 193^2 .

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 75665 - 2¹² = 71569 is a prime.

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, 20 + ... + 389.

It is an arithmetic number, because the mean of its divisors is an integer number (11685).

2⁷⁵⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

75665 is a deficient number, since it is larger than the sum of its proper divisors (17815).

75665 is a wasteful number, since it uses less digits than its factorization.

75665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451.

The product of its digits is 6300, while the sum is 29.

The square root of 75665 is about 275.0727176584. The cubic root of 75665 is about 42.2959072918.

The spelling of 75665 in words is "seventy-five thousand, six hundred sixty-five".