66134725 has 48 divisors (see below), whose sum is σ = 91601280. Its totient is φ = 47174400.

The previous prime is 66134713. The next prime is 66134737. The reversal of 66134725 is 52743166.

It is a happy number.

66134725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66134713) and next prime (66134737).

It is not a de Polignac number, because 66134725 - 2⁷ = 66134597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 931440 + ... + 931510.

It is an arithmetic number, because the mean of its divisors is an integer number (1908360).

Almost surely, 2^66134725 is an apocalyptic number.

It is an amenable number.

66134725 is a deficient number, since it is larger than the sum of its proper divisors (25466555).

66134725 is a wasteful number, since it uses less digits than its factorization.

66134725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 185 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 66134725 is about 8132.3259280479. The cubic root of 66134725 is about 404.3987929801.

The spelling of 66134725 in words is "sixty-six million, one hundred thirty-four thousand, seven hundred twenty-five".