66432225 has 24 divisors (see below), whose sum is σ = 113381632. Its totient is φ = 34286400.

The previous prime is 66432221. The next prime is 66432229. The reversal of 66432225 is 52223466.

It is an interprime number because it is at equal distance from previous prime (66432221) and next prime (66432229).

It is not a de Polignac number, because 66432225 - 2² = 66432221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66432192 and 66432201.

It is not an unprimeable number, because it can be changed into a prime (66432221) 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, 11962 + ... + 16611.

Almost surely, 2^66432225 is an apocalyptic number.

It is an amenable number.

66432225 is a deficient number, since it is larger than the sum of its proper divisors (46949407).

66432225 is a wasteful number, since it uses less digits than its factorization.

66432225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28617 (or 28612 counting only the distinct ones).

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

The square root of 66432225 is about 8150.5966039303. The cubic root of 66432225 is about 405.0042675972.

The spelling of 66432225 in words is "sixty-six million, four hundred thirty-two thousand, two hundred twenty-five".