66683645773344 has 192 divisors, whose sum is σ = 205941182590080. Its totient is φ = 20919709900800.

The previous prime is 66683645773343. The next prime is 66683645773351. The reversal of 66683645773344 is 44337754638666.

It is a super-2 number, since 2×66683645773344² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (66683645773343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 731431507 + ... + 731522669.

It is an arithmetic number, because the mean of its divisors is an integer number (1072610325990).

Almost surely, 2^{66683645773344} is an apocalyptic number.

It is an amenable number.

66683645773344 is an abundant number, since it is smaller than the sum of its proper divisors (139257536816736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66683645773344 is a wasteful number, since it uses less digits than its factorization.

66683645773344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141000 (or 140986 counting only the distinct ones).

The product of its digits is 4389396480, while the sum is 72.

The spelling of 66683645773344 in words is "sixty-six trillion, six hundred eighty-three billion, six hundred forty-five million, seven hundred seventy-three thousand, three hundred forty-four".