66264225 has 24 divisors (see below), whose sum is σ = 112522560. Its totient is φ = 34384320.

The previous prime is 66264223. The next prime is 66264259. The reversal of 66264225 is 52246266.

It is not a de Polignac number, because 66264225 - 2¹ = 66264223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66264223) 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, 9165 + ... + 14714.

It is an arithmetic number, because the mean of its divisors is an integer number (4688440).

Almost surely, 2^66264225 is an apocalyptic number.

It is an amenable number.

66264225 is a deficient number, since it is larger than the sum of its proper divisors (46258335).

66264225 is a wasteful number, since it uses less digits than its factorization.

66264225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23929 (or 23924 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 66264225 is about 8140.2840859518. The cubic root of 66264225 is about 404.6625752253.

The spelling of 66264225 in words is "sixty-six million, two hundred sixty-four thousand, two hundred twenty-five".