66710425 has 12 divisors (see below), whose sum is σ = 87075280. Its totient is φ = 50559120.

The previous prime is 66710407. The next prime is 66710447. The reversal of 66710425 is 52401766.

It is a happy number.

It is not a de Polignac number, because 66710425 - 2¹¹ = 66708377 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69747 + ... + 70696.

Almost surely, 2^66710425 is an apocalyptic number.

It is an amenable number.

66710425 is a deficient number, since it is larger than the sum of its proper divisors (20364855).

66710425 is a wasteful number, since it uses less digits than its factorization.

66710425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140472 (or 140467 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 66710425 is about 8167.6450094259. The cubic root of 66710425 is about 405.5688293092.

The spelling of 66710425 in words is "sixty-six million, seven hundred ten thousand, four hundred twenty-five".