66525789 has 8 divisors (see below), whose sum is σ = 96764832. Its totient is φ = 40318640.

The previous prime is 66525763. The next prime is 66525827. The reversal of 66525789 is 98752566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66525789 - 2⁵ = 66525757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66525089) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1007934 + ... + 1007999.

It is an arithmetic number, because the mean of its divisors is an integer number (12095604).

Almost surely, 2^66525789 is an apocalyptic number.

It is an amenable number.

66525789 is a deficient number, since it is larger than the sum of its proper divisors (30239043).

66525789 is a wasteful number, since it uses less digits than its factorization.

66525789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015947.

The product of its digits is 907200, while the sum is 48.

The square root of 66525789 is about 8156.3342869208. The cubic root of 66525789 is about 405.1943161424.

The spelling of 66525789 in words is "sixty-six million, five hundred twenty-five thousand, seven hundred eighty-nine".