1660047400000 has 252 divisors, whose sum is σ = 4525838523108. Its totient is φ = 603644800000.

The previous prime is 1660047399977. The next prime is 1660047400013. The reversal of 1660047400000 is 47400661.

It can be written as a sum of positive squares in 6 ways, for example, as 1588668659776 + 71378740224 = 1260424^2 + 267168^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24165702 + ... + 24234298.

It is an arithmetic number, because the mean of its divisors is an integer number (17959676679).

Almost surely, 2^{1660047400000} is an apocalyptic number.

1660047400000 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 1660047400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262919261554).

1660047400000 is an abundant number, since it is smaller than the sum of its proper divisors (2865791123108).

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

1660047400000 is an frugal number, since it uses more digits than its factorization.

1660047400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68656 (or 68615 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 1660047400000 in words is "one trillion, six hundred sixty billion, forty-seven million, four hundred thousand".