1664274168 has 64 divisors (see below), whose sum is σ = 4678732800. Its totient is φ = 548068320.

The previous prime is 1664274149. The next prime is 1664274187. The reversal of 1664274168 is 8614724661.

1664274168 is a `hidden beast` number, since 1 + 66 + 427 + 4 + 168 = 666.

It is an interprime number because it is at equal distance from previous prime (1664274149) and next prime (1664274187).

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, 28488 + ... + 64343.

It is an arithmetic number, because the mean of its divisors is an integer number (73105200).

Almost surely, 2^1664274168 is an apocalyptic number.

1664274168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1664274168 is an abundant number, since it is smaller than the sum of its proper divisors (3014458632).

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

1664274168 is a wasteful number, since it uses less digits than its factorization.

1664274168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92929 (or 92919 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1664274168 is about 40795.5165183627. The cubic root of 1664274168 is about 1185.0635056496.

The spelling of 1664274168 in words is "one billion, six hundred sixty-four million, two hundred seventy-four thousand, one hundred sixty-eight".