660347949 has 24 divisors (see below), whose sum is σ = 937995520. Its totient is φ = 413144064.

The previous prime is 660347899. The next prime is 660347971. The reversal of 660347949 is 949743066.

660347949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660347949 - 2¹¹ = 660345901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660347898 and 660347907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660347449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 374532 + ... + 376290.

Almost surely, 2^660347949 is an apocalyptic number.

It is an amenable number.

660347949 is a deficient number, since it is larger than the sum of its proper divisors (277647571).

660347949 is a wasteful number, since it uses less digits than its factorization.

660347949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229 (or 2212 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 660347949 is about 25697.2362132584. The cubic root of 660347949 is about 870.8117446863.

The spelling of 660347949 in words is "six hundred sixty million, three hundred forty-seven thousand, nine hundred forty-nine".