665061365 has 8 divisors (see below), whose sum is σ = 798443520. Its totient is φ = 531802512.

The previous prime is 665061359. The next prime is 665061367. The reversal of 665061365 is 563160566.

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 665061365 - 2²⁸ = 396625909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665061367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18509 + ... + 40898.

It is an arithmetic number, because the mean of its divisors is an integer number (99805440).

Almost surely, 2^665061365 is an apocalyptic number.

It is an amenable number.

665061365 is a deficient number, since it is larger than the sum of its proper divisors (133382155).

665061365 is a wasteful number, since it uses less digits than its factorization.

665061365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61651.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 665061365 is about 25788.7837053243. The cubic root of 665061365 is about 872.8787210914.

The spelling of 665061365 in words is "six hundred sixty-five million, sixty-one thousand, three hundred sixty-five".