661115244 has 36 divisors (see below), whose sum is σ = 1638689864. Its totient is φ = 207407616.

The previous prime is 661115219. The next prime is 661115267. The reversal of 661115244 is 442511166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91849 + ... + 98784.

Almost surely, 2^661115244 is an apocalyptic number.

It is an amenable number.

661115244 is an abundant number, since it is smaller than the sum of its proper divisors (977574620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661115244 is a wasteful number, since it uses less digits than its factorization.

661115244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190674 (or 190655 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 661115244 is about 25712.1614027293. The cubic root of 661115244 is about 871.1488956642.

The spelling of 661115244 in words is "six hundred sixty-one million, one hundred fifteen thousand, two hundred forty-four".