660532684240 has 160 divisors (see below), whose sum is σ = 1804995472896. Its totient is φ = 221622497280.

The previous prime is 660532684183. The next prime is 660532684241. The reversal of 660532684240 is 42486235066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660532684241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29927449 + ... + 29949511.

Almost surely, 2^660532684240 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 660532684240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (902497736448).

660532684240 is an abundant number, since it is smaller than the sum of its proper divisors (1144462788656).

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

660532684240 is a wasteful number, since it uses less digits than its factorization.

660532684240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24717 (or 24711 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 660532684240 in words is "six hundred sixty billion, five hundred thirty-two million, six hundred eighty-four thousand, two hundred forty".