1664250252 has 96 divisors (see below), whose sum is σ = 4650024960. Its totient is φ = 453245760.

The previous prime is 1664250239. The next prime is 1664250253. The reversal of 1664250252 is 2520524661.

It is not an unprimeable number, because it can be changed into a prime (1664250253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169699 + ... + 179237.

It is an arithmetic number, because the mean of its divisors is an integer number (48437760).

Almost surely, 2^1664250252 is an apocalyptic number.

1664250252 is a gapful number since it is divisible by the number (12) 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 1664250252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2325012480).

1664250252 is an abundant number, since it is smaller than the sum of its proper divisors (2985774708).

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

1664250252 is a wasteful number, since it uses less digits than its factorization.

1664250252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9651 (or 9649 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 1664250252 is about 40795.2233968635. The cubic root of 1664250252 is about 1185.0578290780.

The spelling of 1664250252 in words is "one billion, six hundred sixty-four million, two hundred fifty thousand, two hundred fifty-two".