66494785965 has 8 divisors (see below), whose sum is σ = 106391657568. Its totient is φ = 35463885840.

The previous prime is 66494785961. The next prime is 66494786011. The reversal of 66494785965 is 56958749466.

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

It is not a de Polignac number, because 66494785965 - 2² = 66494785961 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66494785965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66494785961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2216492851 + ... + 2216492880.

It is an arithmetic number, because the mean of its divisors is an integer number (13298957196).

Almost surely, 2^66494785965 is an apocalyptic number.

It is an amenable number.

66494785965 is a deficient number, since it is larger than the sum of its proper divisors (39896871603).

66494785965 is a wasteful number, since it uses less digits than its factorization.

66494785965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432985739.

The product of its digits is 391910400, while the sum is 69.

The spelling of 66494785965 in words is "sixty-six billion, four hundred ninety-four million, seven hundred eighty-five thousand, nine hundred sixty-five".