66425003 has 4 divisors (see below), whose sum is σ = 66769368. Its totient is φ = 66080640.

The previous prime is 66424997. The next prime is 66425011. The reversal of 66425003 is 30052466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66425003 - 2⁴ = 66424987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66425903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171893 + ... + 172278.

It is an arithmetic number, because the mean of its divisors is an integer number (16692342).

Almost surely, 2^66425003 is an apocalyptic number.

66425003 is a deficient number, since it is larger than the sum of its proper divisors (344365).

66425003 is a wasteful number, since it uses less digits than its factorization.

66425003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344364.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 66425003 is about 8150.1535568356. The cubic root of 66425003 is about 404.9895907501.

Adding to 66425003 its reverse (30052466), we get a palindrome (96477469).

The spelling of 66425003 in words is "sixty-six million, four hundred twenty-five thousand, three".