1669844160 has 280 divisors, whose sum is σ = 6200400096. Its totient is φ = 425779200.

The previous prime is 1669844147. The next prime is 1669844167. The reversal of 1669844160 is 614489661.

1669844160 is a `hidden beast` number, since 1 + 66 + 98 + 441 + 60 = 666.

It is a super-2 number, since 2×1669844160² = 5576759037372211200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1669844167) 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, 594760 + ... + 597560.

Almost surely, 2^1669844160 is an apocalyptic number.

1669844160 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 1669844160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3100200048).

1669844160 is an abundant number, since it is smaller than the sum of its proper divisors (4530555936).

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

1669844160 is a wasteful number, since it uses less digits than its factorization.

1669844160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853 (or 2834 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1669844160 is about 40863.7267022967. The cubic root of 1669844160 is about 1186.3840901601.

The spelling of 1669844160 in words is "one billion, six hundred sixty-nine million, eight hundred forty-four thousand, one hundred sixty".