664125134 has 16 divisors (see below), whose sum is σ = 1042203456. Its totient is φ = 317068800.

The previous prime is 664125131. The next prime is 664125157. The reversal of 664125134 is 431521466.

It is a super-2 number, since 2×664125134² = 882124387221035912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664125134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664125131) 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 7 ways as a sum of consecutive naturals, for example, 82307 + ... + 90014.

It is an arithmetic number, because the mean of its divisors is an integer number (65137716).

Almost surely, 2^664125134 is an apocalyptic number.

664125134 is a deficient number, since it is larger than the sum of its proper divisors (378078322).

664125134 is a wasteful number, since it uses less digits than its factorization.

664125134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172411.

The product of its digits is 17280, while the sum is 32.

The square root of 664125134 is about 25770.6254095627. The cubic root of 664125134 is about 872.4689343980.

The spelling of 664125134 in words is "six hundred sixty-four million, one hundred twenty-five thousand, one hundred thirty-four".