66556325 has 24 divisors (see below), whose sum is σ = 92244096. Its totient is φ = 47216000.

The previous prime is 66556291. The next prime is 66556327. The reversal of 66556325 is 52365566.

It is not a de Polignac number, because 66556325 - 2⁶ = 66556261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66556327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8324 + ... + 14226.

It is an arithmetic number, because the mean of its divisors is an integer number (3843504).

Almost surely, 2^66556325 is an apocalyptic number.

It is an amenable number.

66556325 is a deficient number, since it is larger than the sum of its proper divisors (25687771).

66556325 is a wasteful number, since it uses less digits than its factorization.

66556325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965 (or 5960 counting only the distinct ones).

The product of its digits is 162000, while the sum is 38.

The square root of 66556325 is about 8158.2059915155. The cubic root of 66556325 is about 405.2563027353.

The spelling of 66556325 in words is "sixty-six million, five hundred fifty-six thousand, three hundred twenty-five".