66682725 has 24 divisors (see below), whose sum is σ = 111352992. Its totient is φ = 35208000.

The previous prime is 66682717. The next prime is 66682741. The reversal of 66682725 is 52728666.

It is not a de Polignac number, because 66682725 - 2³ = 66682717 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 (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3174 + ... + 11976.

It is an arithmetic number, because the mean of its divisors is an integer number (4639708).

Almost surely, 2^66682725 is an apocalyptic number.

It is an amenable number.

66682725 is a deficient number, since it is larger than the sum of its proper divisors (44670267).

66682725 is a wasteful number, since it uses less digits than its factorization.

66682725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8917 (or 8912 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 66682725 is about 8165.9491181369. The cubic root of 66682725 is about 405.5126871002.

The spelling of 66682725 in words is "sixty-six million, six hundred eighty-two thousand, seven hundred twenty-five".