1664050000 has 120 divisors (see below), whose sum is σ = 4207980672. Its totient is φ = 636240000.

The previous prime is 1664049997. The next prime is 1664050007. The reversal of 1664050000 is 504661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664050007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1149277 + ... + 1150723.

Almost surely, 2^1664050000 is an apocalyptic number.

1664050000 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 1664050000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2103990336).

1664050000 is an abundant number, since it is smaller than the sum of its proper divisors (2543930672).

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

1664050000 is an equidigital number, since it uses as much as digits as its factorization.

1664050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503 (or 1477 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1664050000 is about 40792.7689670608. The cubic root of 1664050000 is about 1185.0102962187.

Adding to 1664050000 its reverse (504661), we get a palindrome (1664554661).

The spelling of 1664050000 in words is "one billion, six hundred sixty-four million, fifty thousand".