66426225 has 48 divisors (see below), whose sum is σ = 118599552. Its totient is φ = 32680960.

The previous prime is 66426197. The next prime is 66426247. The reversal of 66426225 is 52262466.

It is not a de Polignac number, because 66426225 - 2⁹ = 66425713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67084 + ... + 68066.

It is an arithmetic number, because the mean of its divisors is an integer number (2470824).

Almost surely, 2^66426225 is an apocalyptic number.

It is an amenable number.

66426225 is a deficient number, since it is larger than the sum of its proper divisors (52173327).

66426225 is a wasteful number, since it uses less digits than its factorization.

66426225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1061 counting only the distinct ones).

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

The square root of 66426225 is about 8150.2285244035. The cubic root of 66426225 is about 404.9920742238.

The spelling of 66426225 in words is "sixty-six million, four hundred twenty-six thousand, two hundred twenty-five".