66316475585823 has 8 divisors (see below), whose sum is σ = 88422017359536. Its totient is φ = 44210958768000.

The previous prime is 66316475585813. The next prime is 66316475585839. The reversal of 66316475585823 is 32858557461366.

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

It is not a de Polignac number, because 66316475585823 - 2⁴ = 66316475585807 is a prime.

It is a super-2 number, since 2×66316475585823² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66316475585813) 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, 1243473 + ... + 11583573.

It is an arithmetic number, because the mean of its divisors is an integer number (11052752169942).

Almost surely, 2^{66316475585823} is an apocalyptic number.

66316475585823 is a deficient number, since it is larger than the sum of its proper divisors (22105541773713).

66316475585823 is a wasteful number, since it uses less digits than its factorization.

66316475585823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12477945.

The product of its digits is 870912000, while the sum is 69.

The spelling of 66316475585823 in words is "sixty-six trillion, three hundred sixteen billion, four hundred seventy-five million, five hundred eighty-five thousand, eight hundred twenty-three".