1664603376 has 80 divisors (see below), whose sum is σ = 4561434240. Its totient is φ = 521614080.

The previous prime is 1664603363. The next prime is 1664603407. The reversal of 1664603376 is 6733064661.

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, 112506 + ... + 126438.

It is an arithmetic number, because the mean of its divisors is an integer number (57017928).

Almost surely, 2^1664603376 is an apocalyptic number.

1664603376 is a gapful number since it is divisible by the number (16) 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 1664603376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2280717120).

1664603376 is an abundant number, since it is smaller than the sum of its proper divisors (2896830864).

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

1664603376 is a wasteful number, since it uses less digits than its factorization.

1664603376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14094 (or 14088 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 42.

The square root of 1664603376 is about 40799.5511740019. The cubic root of 1664603376 is about 1185.1416391433.

The spelling of 1664603376 in words is "one billion, six hundred sixty-four million, six hundred three thousand, three hundred seventy-six".