66425031523 has 8 divisors (see below), whose sum is σ = 67591003760. Its totient is φ = 65261544480.

The previous prime is 66425031499. The next prime is 66425031539. The reversal of 66425031523 is 32513052466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66425031523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66422031523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567333 + ... + 674326.

It is an arithmetic number, because the mean of its divisors is an integer number (8448875470).

Almost surely, 2^66425031523 is an apocalyptic number.

66425031523 is a deficient number, since it is larger than the sum of its proper divisors (1165972237).

66425031523 is a wasteful number, since it uses less digits than its factorization.

66425031523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242597.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 66425031523 its reverse (32513052466), we get a palindrome (98938083989).

The spelling of 66425031523 in words is "sixty-six billion, four hundred twenty-five million, thirty-one thousand, five hundred twenty-three".