665174065 has 8 divisors (see below), whose sum is σ = 799020288. Its totient is φ = 531598320.

The previous prime is 665174063. The next prime is 665174129. The reversal of 665174065 is 560471566.

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

It is not a de Polignac number, because 665174065 - 2¹ = 665174063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665174063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62167 + ... + 72076.

It is an arithmetic number, because the mean of its divisors is an integer number (99877536).

Almost surely, 2^665174065 is an apocalyptic number.

It is an amenable number.

665174065 is a deficient number, since it is larger than the sum of its proper divisors (133846223).

665174065 is a wasteful number, since it uses less digits than its factorization.

665174065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135239.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 665174065 is about 25790.9686712229. The cubic root of 665174065 is about 872.9280237477.

The spelling of 665174065 in words is "six hundred sixty-five million, one hundred seventy-four thousand, sixty-five".