66134876659 has 4 divisors (see below), whose sum is σ = 66789677520. Its totient is φ = 65480075800.

The previous prime is 66134876653. The next prime is 66134876707. The reversal of 66134876659 is 95667843166.

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 66134876659 - 2³ = 66134876651 is a prime.

It is a super-2 number, since 2×66134876659² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66134876597 and 66134876606.

It is not an unprimeable number, because it can be changed into a prime (66134876651) 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, 327400279 + ... + 327400480.

It is an arithmetic number, because the mean of its divisors is an integer number (16697419380).

Almost surely, 2^66134876659 is an apocalyptic number.

66134876659 is a deficient number, since it is larger than the sum of its proper divisors (654800861).

66134876659 is a wasteful number, since it uses less digits than its factorization.

66134876659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654800860.

The product of its digits is 39191040, while the sum is 61.

The spelling of 66134876659 in words is "sixty-six billion, one hundred thirty-four million, eight hundred seventy-six thousand, six hundred fifty-nine".