665051573643 has 8 divisors (see below), whose sum is σ = 889568453328. Its totient is φ = 441951204864.

The previous prime is 665051573633. The next prime is 665051573663. The reversal of 665051573643 is 346375150566.

665051573643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665051573643 - 2⁸ = 665051573387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665051573603) 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, 354126630 + ... + 354128507.

It is an arithmetic number, because the mean of its divisors is an integer number (111196056666).

Almost surely, 2^665051573643 is an apocalyptic number.

665051573643 is a deficient number, since it is larger than the sum of its proper divisors (224516879685).

665051573643 is a wasteful number, since it uses less digits than its factorization.

665051573643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708255453.

The product of its (nonzero) digits is 6804000, while the sum is 51.

The spelling of 665051573643 in words is "six hundred sixty-five billion, fifty-one million, five hundred seventy-three thousand, six hundred forty-three".