1664220504 has 64 divisors (see below), whose sum is σ = 4325811840. Its totient is φ = 533111040.

The previous prime is 1664220433. The next prime is 1664220527. The reversal of 1664220504 is 4050224661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53307 + ... + 78549.

It is an arithmetic number, because the mean of its divisors is an integer number (67590810).

Almost surely, 2^1664220504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664220504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2162905920).

1664220504 is an abundant number, since it is smaller than the sum of its proper divisors (2661591336).

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

1664220504 is a wasteful number, since it uses less digits than its factorization.

1664220504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25360 (or 25356 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1664220504 is about 40794.8587937255. The cubic root of 1664220504 is about 1185.0507681787.

The spelling of 1664220504 in words is "one billion, six hundred sixty-four million, two hundred twenty thousand, five hundred four".