66434307625 has 32 divisors (see below), whose sum is σ = 94787447040. Its totient is φ = 45539020800.

The previous prime is 66434307623. The next prime is 66434307631. The reversal of 66434307625 is 52670343466.

It is a happy number.

It is not a de Polignac number, because 66434307625 - 2¹ = 66434307623 is a prime.

It is a super-2 number, since 2×66434307625² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66434307623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2839977 + ... + 2863273.

It is an arithmetic number, because the mean of its divisors is an integer number (2962107720).

Almost surely, 2^66434307625 is an apocalyptic number.

It is an amenable number.

66434307625 is a deficient number, since it is larger than the sum of its proper divisors (28353139415).

66434307625 is a wasteful number, since it uses less digits than its factorization.

66434307625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26578 (or 26568 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 46.

The spelling of 66434307625 in words is "sixty-six billion, four hundred thirty-four million, three hundred seven thousand, six hundred twenty-five".