665346040211230 has 32 divisors (see below), whose sum is σ = 1394536606121664. Its totient is φ = 223814517029376.

The previous prime is 665346040211201. The next prime is 665346040211233. The reversal of 665346040211230 is 32112040643566.

It is a happy number.

It is a super-2 number, since 2×665346040211230² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665346040211233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89669273947 + ... + 89669281366.

It is an arithmetic number, because the mean of its divisors is an integer number (43579268941302).

Almost surely, 2^{665346040211230} is an apocalyptic number.

665346040211230 is an abundant number, since it is smaller than the sum of its proper divisors (729190565910434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665346040211230 is a wasteful number, since it uses less digits than its factorization.

665346040211230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179338555380.

The product of its (nonzero) digits is 622080, while the sum is 43.

Adding to 665346040211230 its reverse (32112040643566), we get a palindrome (697458080854796).

The spelling of 665346040211230 in words is "six hundred sixty-five trillion, three hundred forty-six billion, forty million, two hundred eleven thousand, two hundred thirty".