664012143 has 48 divisors (see below), whose sum is σ = 1008184320. Its totient is φ = 420818112.

The previous prime is 664012127. The next prime is 664012199. The reversal of 664012143 is 341210466.

664012143 is a `hidden beast` number, since 6 + 640 + 1 + 2 + 14 + 3 = 666.

664012143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664012143 - 2⁴ = 664012127 is a prime.

It is a super-3 number, since 3×664012143³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664012103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2524630 + ... + 2524892.

It is an arithmetic number, because the mean of its divisors is an integer number (21003840).

Almost surely, 2^664012143 is an apocalyptic number.

664012143 is a deficient number, since it is larger than the sum of its proper divisors (344172177).

664012143 is a wasteful number, since it uses less digits than its factorization.

664012143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 664012143 is about 25768.4330722689. The cubic root of 664012143 is about 872.4194523935.

The spelling of 664012143 in words is "six hundred sixty-four million, twelve thousand, one hundred forty-three".