1660169274400 has 864 divisors, whose sum is σ = 5332293711360. Its totient is φ = 499325460480.

The previous prime is 1660169274359. The next prime is 1660169274403. The reversal of 1660169274400 is 44729610661.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (1660169274403) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2308997241 + ... + 2308997959.

It is an arithmetic number, because the mean of its divisors is an integer number (6171636240).

Almost surely, 2^{1660169274400} is an apocalyptic number.

1660169274400 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 1660169274400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2666146855680).

1660169274400 is an abundant number, since it is smaller than the sum of its proper divisors (3672124436960).

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

1660169274400 is a wasteful number, since it uses less digits than its factorization.

1660169274400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 1660169274400 in words is "one trillion, six hundred sixty billion, one hundred sixty-nine million, two hundred seventy-four thousand, four hundred".