664166133 has 12 divisors (see below), whose sum is σ = 960036480. Its totient is φ = 442461096.

The previous prime is 664166131. The next prime is 664166137. The reversal of 664166133 is 331661466.

664166133 is a `hidden beast` number, since 6 + 641 + 6 + 6 + 1 + 3 + 3 = 666.

It is not a de Polignac number, because 664166133 - 2¹ = 664166131 is a prime.

It is a super-2 number, since 2×664166133² = 882233304448347378, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664166131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12691 + ... + 38592.

It is an arithmetic number, because the mean of its divisors is an integer number (80003040).

Almost surely, 2^664166133 is an apocalyptic number.

It is an amenable number.

664166133 is a deficient number, since it is larger than the sum of its proper divisors (295870347).

664166133 is a wasteful number, since it uses less digits than its factorization.

664166133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52728 (or 52725 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 664166133 is about 25771.4208572209. The cubic root of 664166133 is about 872.4868876501.

The spelling of 664166133 in words is "six hundred sixty-four million, one hundred sixty-six thousand, one hundred thirty-three".