74665 has 8 divisors (see below), whose sum is σ = 91080. Its totient is φ = 58752.

The previous prime is 74653. The next prime is 74687. The reversal of 74665 is 56647.

It can be written as a sum of positive squares in 4 ways, for example, as 15129 + 59536 = 123^2 + 244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(74665) divides (74665-1)³.

It is a cyclic number.

It is not a de Polignac number, because 74665 - 2¹¹ = 72617 is a prime.

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, 477 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (11385).

It is a Poulet number, since it divides 2⁷⁴⁶⁶⁴-1.

2⁷⁴⁶⁶⁵ is an apocalyptic number.

74665 is the 137-th decagonal number.

It is an amenable number.

74665 is a deficient number, since it is larger than the sum of its proper divisors (16415).

74665 is a wasteful number, since it uses less digits than its factorization.

74665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251.

The product of its digits is 5040, while the sum is 28.

The square root of 74665 is about 273.2489707208. The cubic root of 74665 is about 42.1087506706.

The spelling of 74665 in words is "seventy-four thousand, six hundred sixty-five".