66725085 has 64 divisors (see below), whose sum is σ = 133747200. Its totient is φ = 27697152.

The previous prime is 66725077. The next prime is 66725089. The reversal of 66725085 is 58052766.

It is a happy number.

It is not a de Polignac number, because 66725085 - 2³ = 66725077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66725089) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51121 + ... + 52409.

It is an arithmetic number, because the mean of its divisors is an integer number (2089800).

Almost surely, 2^66725085 is an apocalyptic number.

It is an amenable number.

66725085 is an abundant number, since it is smaller than the sum of its proper divisors (67022115).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66725085 is a wasteful number, since it uses less digits than its factorization.

66725085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 66725085 is about 8168.5424036360. The cubic root of 66725085 is about 405.5985358283.

It can be divided in two parts, 667 and 25085, that added together give a palindrome (25752).

The spelling of 66725085 in words is "sixty-six million, seven hundred twenty-five thousand, eighty-five".