66916553245 has 8 divisors (see below), whose sum is σ = 84526172640. Its totient is φ = 50715703440.

The previous prime is 66916553243. The next prime is 66916553251. The reversal of 66916553245 is 54235561966.

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

It is not a de Polignac number, because 66916553245 - 2¹ = 66916553243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66916553192 and 66916553201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66916553243) 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 7 ways as a sum of consecutive naturals, for example, 352192291 + ... + 352192480.

It is an arithmetic number, because the mean of its divisors is an integer number (10565771580).

Almost surely, 2^66916553245 is an apocalyptic number.

It is an amenable number.

66916553245 is a deficient number, since it is larger than the sum of its proper divisors (17609619395).

66916553245 is a wasteful number, since it uses less digits than its factorization.

66916553245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704384795.

The product of its digits is 5832000, while the sum is 52.

The spelling of 66916553245 in words is "sixty-six billion, nine hundred sixteen million, five hundred fifty-three thousand, two hundred forty-five".