665661030588 has 48 divisors (see below), whose sum is σ = 1741620804000. Its totient is φ = 219851345664.

The previous prime is 665661030563. The next prime is 665661030607. The reversal of 665661030588 is 885030166566.

665661030588 is a `hidden beast` number, since 6 + 6 + 56 + 6 + 1 + 0 + 3 + 0 + 588 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28261293 + ... + 28284836.

It is an arithmetic number, because the mean of its divisors is an integer number (36283766750).

Almost surely, 2^665661030588 is an apocalyptic number.

It is an amenable number.

665661030588 is an abundant number, since it is smaller than the sum of its proper divisors (1075959773412).

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

665661030588 is a wasteful number, since it uses less digits than its factorization.

665661030588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56546251 (or 56546243 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 665661030588 in words is "six hundred sixty-five billion, six hundred sixty-one million, thirty thousand, five hundred eighty-eight".