66404325 has 60 divisors (see below), whose sum is σ = 122773888. Its totient is φ = 31636800.

The previous prime is 66404321. The next prime is 66404347. The reversal of 66404325 is 52340466.

It is not a de Polignac number, because 66404325 - 2² = 66404321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66404292 and 66404301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66404321) by changing a digit.

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 59 ways as a sum of consecutive naturals, for example, 2142060 + ... + 2142090.

Almost surely, 2^66404325 is an apocalyptic number.

66404325 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66404325 is a deficient number, since it is larger than the sum of its proper divisors (56369563).

66404325 is an equidigital number, since it uses as much as digits as its factorization.

66404325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 66404325 is about 8148.8848930390. The cubic root of 66404325 is about 404.9475621790.

The spelling of 66404325 in words is "sixty-six million, four hundred four thousand, three hundred twenty-five".