660886849 has 8 divisors (see below), whose sum is σ = 799728768. Its totient is φ = 533152320.

The previous prime is 660886841. The next prime is 660886867. The reversal of 660886849 is 948688066.

It is a happy number.

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 660886849 - 2³ = 660886841 is a prime.

It is a super-2 number, since 2×660886849² = 873542854362297602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660886849.

It is not an unprimeable number, because it can be changed into a prime (660886841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2776717 + ... + 2776954.

It is an arithmetic number, because the mean of its divisors is an integer number (99966096).

Almost surely, 2^660886849 is an apocalyptic number.

It is an amenable number.

660886849 is a deficient number, since it is larger than the sum of its proper divisors (138841919).

660886849 is a wasteful number, since it uses less digits than its factorization.

660886849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5553695.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The square root of 660886849 is about 25707.7196382721. The cubic root of 660886849 is about 871.0485657190.

The spelling of 660886849 in words is "six hundred sixty million, eight hundred eighty-six thousand, eight hundred forty-nine".