661528462336 has 99 divisors (see below), whose sum is σ = 1538738499447. Its totient is φ = 283434117120.

The previous prime is 661528462289. The next prime is 661528462391. The reversal of 661528462336 is 633264825166.

The square root of 661528462336 is 813344.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 182187241 + ... + 182190871.

Almost surely, 2^661528462336 is an apocalyptic number.

661528462336 is the 813344-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661528462336

661528462336 is an abundant number, since it is smaller than the sum of its proper divisors (877210037111).

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

661528462336 is an frugal number, since it uses more digits than its factorization.

661528462336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7296 (or 3640 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 52.

The spelling of 661528462336 in words is "six hundred sixty-one billion, five hundred twenty-eight million, four hundred sixty-two thousand, three hundred thirty-six".