665346040211229 has 32 divisors (see below), whose sum is σ = 961130519072640. Its totient is φ = 406975534234368.

The previous prime is 665346040211201. The next prime is 665346040211233. The reversal of 665346040211229 is 922112040643566.

It is not a de Polignac number, because 665346040211229 - 2⁵ = 665346040211197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665346040212229) 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 31 ways as a sum of consecutive naturals, for example, 14788942 + ... + 39362480.

It is an arithmetic number, because the mean of its divisors is an integer number (30035328721020).

Almost surely, 2^{665346040211229} is an apocalyptic number.

It is an amenable number.

665346040211229 is a deficient number, since it is larger than the sum of its proper divisors (295784478861411).

665346040211229 is a wasteful number, since it uses less digits than its factorization.

665346040211229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24577741.

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 665346040211229 in words is "six hundred sixty-five trillion, three hundred forty-six billion, forty million, two hundred eleven thousand, two hundred twenty-nine".