66513276683 has 4 divisors (see below), whose sum is σ = 76015173360. Its totient is φ = 57011380008.

The previous prime is 66513276659. The next prime is 66513276689. The reversal of 66513276683 is 38667231566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38667231566 = 2 ⋅19333615783.

It is a cyclic number.

It is not a de Polignac number, because 66513276683 - 2⁶ = 66513276619 is a prime.

It is a super-2 number, since 2×66513276683² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66513276689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4750948328 + ... + 4750948341.

It is an arithmetic number, because the mean of its divisors is an integer number (19003793340).

Almost surely, 2^66513276683 is an apocalyptic number.

66513276683 is a deficient number, since it is larger than the sum of its proper divisors (9501896677).

66513276683 is an equidigital number, since it uses as much as digits as its factorization.

66513276683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9501896676.

The product of its digits is 6531840, while the sum is 53.

The spelling of 66513276683 in words is "sixty-six billion, five hundred thirteen million, two hundred seventy-six thousand, six hundred eighty-three".