1664268168 has 32 divisors (see below), whose sum is σ = 4164508800. Its totient is φ = 554244288.

The previous prime is 1664268163. The next prime is 1664268223. The reversal of 1664268168 is 8618624661.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1664268161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4963 + ... + 57906.

It is an arithmetic number, because the mean of its divisors is an integer number (130140900).

Almost surely, 2^1664268168 is an apocalyptic number.

It is an amenable number.

1664268168 is an abundant number, since it is smaller than the sum of its proper divisors (2500240632).

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

1664268168 is a wasteful number, since it uses less digits than its factorization.

1664268168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63981 (or 63977 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 1664268168 is about 40795.4429808036. The cubic root of 1664268168 is about 1185.0620815274.

The spelling of 1664268168 in words is "one billion, six hundred sixty-four million, two hundred sixty-eight thousand, one hundred sixty-eight".