660320143 has 8 divisors (see below), whose sum is σ = 754956288. Its totient is φ = 565760184.

The previous prime is 660320051. The next prime is 660320173. The reversal of 660320143 is 341023066.

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

It is a cyclic number.

It is not a de Polignac number, because 660320143 - 2⁹ = 660319631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660320173) 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, 930 + ... + 36352.

It is an arithmetic number, because the mean of its divisors is an integer number (94369536).

Almost surely, 2^660320143 is an apocalyptic number.

660320143 is a deficient number, since it is larger than the sum of its proper divisors (94636145).

660320143 is a wasteful number, since it uses less digits than its factorization.

660320143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38093.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 660320143 is about 25696.6951766176. The cubic root of 660320143 is about 870.7995217710.

The spelling of 660320143 in words is "six hundred sixty million, three hundred twenty thousand, one hundred forty-three".