66362681357973 has 216 divisors, whose sum is σ = 131759407817856. Its totient is φ = 31813094476800.

The previous prime is 66362681357971. The next prime is 66362681357977. The reversal of 66362681357973 is 37975318626366.

66362681357973 is a `hidden beast` number, since 6 + 6 + 3 + 6 + 268 + 1 + 357 + 9 + 7 + 3 = 666.

It is not a de Polignac number, because 66362681357973 - 2¹ = 66362681357971 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66362681357971) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 3476842836 + ... + 3476861922.

It is an arithmetic number, because the mean of its divisors is an integer number (609997258416).

Almost surely, 2^{66362681357973} is an apocalyptic number.

66362681357973 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

66362681357973 is a deficient number, since it is larger than the sum of its proper divisors (65396726459883).

66362681357973 is a wasteful number, since it uses less digits than its factorization.

66362681357973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23385 (or 23362 counting only the distinct ones).

The product of its digits is 1234517760, while the sum is 72.

The spelling of 66362681357973 in words is "sixty-six trillion, three hundred sixty-two billion, six hundred eighty-one million, three hundred fifty-seven thousand, nine hundred seventy-three".