1669420800 has 216 divisors, whose sum is σ = 6122229680. Its totient is φ = 445132800.

The previous prime is 1669420789. The next prime is 1669420847. The reversal of 1669420800 is 80249661.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167970 + ... + 177630.

Almost surely, 2^1669420800 is an apocalyptic number.

1669420800 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 1669420800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3061114840).

1669420800 is an abundant number, since it is smaller than the sum of its proper divisors (4452808880).

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

1669420800 is an equidigital number, since it uses as much as digits as its factorization.

1669420800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9696 (or 9671 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1669420800 is about 40858.5462296445. The cubic root of 1669420800 is about 1186.2838193218.

The spelling of 1669420800 in words is "one billion, six hundred sixty-nine million, four hundred twenty thousand, eight hundred".