66207225 has 48 divisors (see below), whose sum is σ = 130563072. Its totient is φ = 28944960.

The previous prime is 66207223. The next prime is 66207233. The reversal of 66207225 is 52270266.

It is not a de Polignac number, because 66207225 - 2¹ = 66207223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66207192 and 66207201.

It is not an unprimeable number, because it can be changed into a prime (66207223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9334 + ... + 14816.

It is an arithmetic number, because the mean of its divisors is an integer number (2720064).

Almost surely, 2^66207225 is an apocalyptic number.

It is an amenable number.

66207225 is a deficient number, since it is larger than the sum of its proper divisors (64355847).

66207225 is a wasteful number, since it uses less digits than its factorization.

66207225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526 (or 5521 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 66207225 is about 8136.7822264087. The cubic root of 66207225 is about 404.5465126812.

The spelling of 66207225 in words is "sixty-six million, two hundred seven thousand, two hundred twenty-five".