665213205 has 8 divisors (see below), whose sum is σ = 1064341152. Its totient is φ = 354780368.

The previous prime is 665213203. The next prime is 665213207. The reversal of 665213205 is 502312566.

665213205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (665213203) and next prime (665213207).

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 665213205 - 2¹ = 665213203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665213201) 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, 22173759 + ... + 22173788.

It is an arithmetic number, because the mean of its divisors is an integer number (133042644).

Almost surely, 2^665213205 is an apocalyptic number.

It is an amenable number.

665213205 is a deficient number, since it is larger than the sum of its proper divisors (399127947).

665213205 is a wasteful number, since it uses less digits than its factorization.

665213205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44347555.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 665213205 is about 25791.7274528094. The cubic root of 665213205 is about 872.9451449468.

The spelling of 665213205 in words is "six hundred sixty-five million, two hundred thirteen thousand, two hundred five".