66425242507 has 8 divisors (see below), whose sum is σ = 71672186880. Its totient is φ = 61197913920.

The previous prime is 66425242493. The next prime is 66425242531. The reversal of 66425242507 is 70524252466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-66425242507 is a prime.

It is a super-2 number, since 2×66425242507² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66425242537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4896907 + ... + 4910452.

It is an arithmetic number, because the mean of its divisors is an integer number (8959023360).

Almost surely, 2^66425242507 is an apocalyptic number.

66425242507 is a deficient number, since it is larger than the sum of its proper divisors (5246944373).

66425242507 is a wasteful number, since it uses less digits than its factorization.

66425242507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9807893.

The product of its (nonzero) digits is 806400, while the sum is 43.

The spelling of 66425242507 in words is "sixty-six billion, four hundred twenty-five million, two hundred forty-two thousand, five hundred seven".