66330425 has 24 divisors (see below), whose sum is σ = 98952000. Its totient is φ = 43087680.

The previous prime is 66330371. The next prime is 66330431. The reversal of 66330425 is 52403366.

It is not a de Polignac number, because 66330425 - 2⁶ = 66330361 is a prime.

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, 6650 + ... + 13299.

It is an arithmetic number, because the mean of its divisors is an integer number (4123000).

Almost surely, 2^66330425 is an apocalyptic number.

66330425 is the 6650-th pentagonal number.

It is an amenable number.

66330425 is a deficient number, since it is larger than the sum of its proper divisors (32621575).

66330425 is a wasteful number, since it uses less digits than its factorization.

66330425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19985 (or 19980 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 66330425 is about 8144.3492680508. The cubic root of 66330425 is about 404.7972871634.

The spelling of 66330425 in words is "sixty-six million, three hundred thirty thousand, four hundred twenty-five".