66271025 has 24 divisors (see below), whose sum is σ = 85423104. Its totient is φ = 50947200.

The previous prime is 66270979. The next prime is 66271039. The reversal of 66271025 is 52017266.

It is not a de Polignac number, because 66271025 - 2⁶ = 66270961 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180392 + ... + 180758.

It is an arithmetic number, because the mean of its divisors is an integer number (3559296).

Almost surely, 2^66271025 is an apocalyptic number.

It is an amenable number.

66271025 is a deficient number, since it is larger than the sum of its proper divisors (19152079).

66271025 is a wasteful number, since it uses less digits than its factorization.

66271025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 66271025 is about 8140.7017510777. The cubic root of 66271025 is about 404.6764168389.

The spelling of 66271025 in words is "sixty-six million, two hundred seventy-one thousand, twenty-five".