660956850400 has 288 divisors, whose sum is σ = 2031262990848. Its totient is φ = 204010444800.

The previous prime is 660956850391. The next prime is 660956850439. The reversal of 660956850400 is 4058659066.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6292714 + ... + 6396886.

It is an arithmetic number, because the mean of its divisors is an integer number (7052996496).

Almost surely, 2^660956850400 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 660956850400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015631495424).

660956850400 is an abundant number, since it is smaller than the sum of its proper divisors (1370306140448).

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

660956850400 is a wasteful number, since it uses less digits than its factorization.

660956850400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104314 (or 104301 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 660956850400 in words is "six hundred sixty billion, nine hundred fifty-six million, eight hundred fifty thousand, four hundred".