661848568 has 16 divisors (see below), whose sum is σ = 1271234160. Its totient is φ = 322852800.

The previous prime is 661848547. The next prime is 661848569. The reversal of 661848568 is 865848166.

661848568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661848569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008588 + ... + 1009243.

It is an arithmetic number, because the mean of its divisors is an integer number (79452135).

Almost surely, 2^661848568 is an apocalyptic number.

It is an amenable number.

661848568 is a deficient number, since it is larger than the sum of its proper divisors (609385592).

661848568 is a wasteful number, since it uses less digits than its factorization.

661848568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017878 (or 2017874 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 52.

The square root of 661848568 is about 25726.4177063189. The cubic root of 661848568 is about 871.4708760051.

The spelling of 661848568 in words is "six hundred sixty-one million, eight hundred forty-eight thousand, five hundred sixty-eight".