66725 has 12 divisors (see below), whose sum is σ = 88164. Its totient is φ = 49920.

The previous prime is 66721. The next prime is 66733. The reversal of 66725 is 52766.

It can be written as a sum of positive squares in 6 ways, for example, as 676 + 66049 = 26^2 + 257^2 .

It is not a de Polignac number, because 66725 - 2² = 66721 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 66694 and 66703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (7347).

2⁶⁶⁷²⁵ is an apocalyptic number.

It is an amenable number.

66725 is a deficient number, since it is larger than the sum of its proper divisors (21439).

66725 is a wasteful number, since it uses less digits than its factorization.

66725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 179 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 66725 is about 258.3118270618. The cubic root of 66725 is about 40.5598363600.

The spelling of 66725 in words is "sixty-six thousand, seven hundred twenty-five".