665222205730 has 16 divisors (see below), whose sum is σ = 1236025776384. Its totient is φ = 257505369840.

The previous prime is 665222205719. The next prime is 665222205733. The reversal of 665222205730 is 37502222566.

It is not an unprimeable number, because it can be changed into a prime (665222205733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1072938732 + ... + 1072939351.

It is an arithmetic number, because the mean of its divisors is an integer number (77251611024).

Almost surely, 2^665222205730 is an apocalyptic number.

665222205730 is a deficient number, since it is larger than the sum of its proper divisors (570803570654).

665222205730 is a wasteful number, since it uses less digits than its factorization.

665222205730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145878121.

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 665222205730 in words is "six hundred sixty-five billion, two hundred twenty-two million, two hundred five thousand, seven hundred thirty".