665505502 has 8 divisors (see below), whose sum is σ = 1003485312. Its totient is φ = 331010400.

The previous prime is 665505487. The next prime is 665505509. The reversal of 665505502 is 205505566.

It is a happy number.

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

It is a super-4 number, since 4×665505502⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665505509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870699 + ... + 871462.

It is an arithmetic number, because the mean of its divisors is an integer number (125435664).

Almost surely, 2^665505502 is an apocalyptic number.

665505502 is a deficient number, since it is larger than the sum of its proper divisors (337979810).

665505502 is a wasteful number, since it uses less digits than its factorization.

665505502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742354.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 665505502 is about 25797.3933179304. The cubic root of 665505502 is about 873.0729846036.

The spelling of 665505502 in words is "six hundred sixty-five million, five hundred five thousand, five hundred two".