66660068192256 has 1248 divisors, whose sum is σ = 254064217996800. Its totient is φ = 17076006420480.

The previous prime is 66660068192239. The next prime is 66660068192273. The reversal of 66660068192256 is 65229186006666.

It is an interprime number because it is at equal distance from previous prime (66660068192239) and next prime (66660068192273).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 66660068192193 and 66660068192202.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 4351455765 + ... + 4351471083.

Almost surely, 2^{66660068192256} is an apocalyptic number.

66660068192256 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66660068192256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127032108998400).

66660068192256 is an abundant number, since it is smaller than the sum of its proper divisors (187404149804544).

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

66660068192256 is a wasteful number, since it uses less digits than its factorization.

66660068192256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15450 (or 15415 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 66660068192256 in words is "sixty-six trillion, six hundred sixty billion, sixty-eight million, one hundred ninety-two thousand, two hundred fifty-six".