660789401473 has 4 divisors (see below), whose sum is σ = 660812479060. Its totient is φ = 660766323888.

The previous prime is 660789401443. The next prime is 660789401497. The reversal of 660789401473 is 374104987066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 512666024049 + 148123377424 = 716007^2 + 384868^2 .

It is a cyclic number.

It is not a de Polignac number, because 660789401473 - 2²⁵ = 660755847041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660789401423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11495790 + ... + 11553127.

It is an arithmetic number, because the mean of its divisors is an integer number (165203119765).

Almost surely, 2^660789401473 is an apocalyptic number.

It is an amenable number.

660789401473 is a deficient number, since it is larger than the sum of its proper divisors (23077587).

660789401473 is a wasteful number, since it uses less digits than its factorization.

660789401473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23077586.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 660789401473 in words is "six hundred sixty billion, seven hundred eighty-nine million, four hundred one thousand, four hundred seventy-three".