660789349 has 6 divisors (see below), whose sum is σ = 726322310. Its totient is φ = 600717480.

The previous prime is 660789343. The next prime is 660789421. The reversal of 660789349 is 943987066.

660789349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 477728449 + 183060900 = 21857^2 + 13530^2 .

It is not a de Polignac number, because 660789349 - 2⁷ = 660789221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660789296 and 660789305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660789343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2730414 + ... + 2730655.

Almost surely, 2^660789349 is an apocalyptic number.

It is an amenable number.

660789349 is a deficient number, since it is larger than the sum of its proper divisors (65532961).

660789349 is a wasteful number, since it uses less digits than its factorization.

660789349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5461091 (or 5461080 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 660789349 is about 25705.8232507734. The cubic root of 660789349 is about 871.0057286271.

The spelling of 660789349 in words is "six hundred sixty million, seven hundred eighty-nine thousand, three hundred forty-nine".