665170705270 has 16 divisors (see below), whose sum is σ = 1200924517968. Its totient is φ = 265264449120.

The previous prime is 665170705249. The next prime is 665170705279. The reversal of 665170705270 is 72507071566.

It is a self number, because there is not a number n which added to its sum of digits gives 665170705270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665170705279) 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, 100475649 + ... + 100482268.

It is an arithmetic number, because the mean of its divisors is an integer number (75057782373).

Almost surely, 2^665170705270 is an apocalyptic number.

665170705270 is a deficient number, since it is larger than the sum of its proper divisors (535753812698).

665170705270 is a wasteful number, since it uses less digits than its factorization.

665170705270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200958255.

The product of its (nonzero) digits is 617400, while the sum is 46.

The spelling of 665170705270 in words is "six hundred sixty-five billion, one hundred seventy million, seven hundred five thousand, two hundred seventy".