66314517251 has 8 divisors (see below), whose sum is σ = 67160483520. Its totient is φ = 65468714688.

The previous prime is 66314517229. The next prime is 66314517277. The reversal of 66314517251 is 15271541366.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66314517251 - 2¹⁰ = 66314516227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66314517199 and 66314517208.

It is not an unprimeable number, because it can be changed into a prime (66314517851) 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, 916055 + ... + 985791.

It is an arithmetic number, because the mean of its divisors is an integer number (8395060440).

Almost surely, 2^66314517251 is an apocalyptic number.

66314517251 is a deficient number, since it is larger than the sum of its proper divisors (845966269).

66314517251 is a wasteful number, since it uses less digits than its factorization.

66314517251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81853.

The product of its digits is 151200, while the sum is 41.

The spelling of 66314517251 in words is "sixty-six billion, three hundred fourteen million, five hundred seventeen thousand, two hundred fifty-one".