665120623343 has 32 divisors (see below), whose sum is σ = 768473671680. Its totient is φ = 569313360000.

The previous prime is 665120623309. The next prime is 665120623351. The reversal of 665120623343 is 343326021566.

It is not a de Polignac number, because 665120623343 - 2³² = 660825656047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665120623343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665120623393) 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, 40794293 + ... + 40810593.

It is an arithmetic number, because the mean of its divisors is an integer number (24014802240).

Almost surely, 2^665120623343 is an apocalyptic number.

665120623343 is a deficient number, since it is larger than the sum of its proper divisors (103353048337).

665120623343 is a wasteful number, since it uses less digits than its factorization.

665120623343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17519.

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 665120623343 in words is "six hundred sixty-five billion, one hundred twenty million, six hundred twenty-three thousand, three hundred forty-three".