66494785964 has 24 divisors (see below), whose sum is σ = 118520138688. Its totient is φ = 32635397520.

The previous prime is 66494785961. The next prime is 66494786011. The reversal of 66494785964 is 46958749466.

It is a junction number, because it is equal to n+sod(n) for n = 66494785894 and 66494785903.

It is not an unprimeable number, because it can be changed into a prime (66494785961) 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, 362522 + ... + 514209.

It is an arithmetic number, because the mean of its divisors is an integer number (4938339112).

Almost surely, 2^66494785964 is an apocalyptic number.

It is an amenable number.

66494785964 is a deficient number, since it is larger than the sum of its proper divisors (52025352724).

66494785964 is a wasteful number, since it uses less digits than its factorization.

66494785964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877085 (or 877083 counting only the distinct ones).

The product of its digits is 313528320, while the sum is 68.

The spelling of 66494785964 in words is "sixty-six billion, four hundred ninety-four million, seven hundred eighty-five thousand, nine hundred sixty-four".