1660202587440 has 200 divisors, whose sum is σ = 5769561639600. Its totient is φ = 442457178624.

The previous prime is 1660202587423. The next prime is 1660202587441. The reversal of 1660202587440 is 447852020661.

1660202587440 is a `hidden beast` number, since 1 + 6 + 6 + 0 + 20 + 2 + 587 + 4 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1660202587441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10934122 + ... + 11084918.

It is an arithmetic number, because the mean of its divisors is an integer number (28847808198).

Almost surely, 2^{1660202587440} is an apocalyptic number.

1660202587440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660202587440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2884780819800).

1660202587440 is an abundant number, since it is smaller than the sum of its proper divisors (4109359052160).

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

1660202587440 is a wasteful number, since it uses less digits than its factorization.

1660202587440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152521 (or 152506 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 1660202587440 in words is "one trillion, six hundred sixty billion, two hundred two million, five hundred eighty-seven thousand, four hundred forty".