661588848 has 60 divisors (see below), whose sum is σ = 1864906680. Its totient is φ = 218936448.

The previous prime is 661588819. The next prime is 661588867. The reversal of 661588848 is 848885166.

It is a junction number, because it is equal to n+sod(n) for n = 661588794 and 661588803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3490 + ... + 36542.

It is an arithmetic number, because the mean of its divisors is an integer number (31081778).

Almost surely, 2^661588848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661588848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932453340).

661588848 is an abundant number, since it is smaller than the sum of its proper divisors (1203317832).

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

661588848 is a wasteful number, since it uses less digits than its factorization.

661588848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33206 (or 33197 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 54.

The square root of 661588848 is about 25721.3694814254. The cubic root of 661588848 is about 871.3568680384.

The spelling of 661588848 in words is "six hundred sixty-one million, five hundred eighty-eight thousand, eight hundred forty-eight".