66363736158720 has 3840 divisors, whose sum is σ = 326619695001600. Its totient is φ = 11992985763840.

The previous prime is 66363736158679. The next prime is 66363736158803. The reversal of 66363736158720 is 2785163736366.

66363736158720 is a `hidden beast` number, since 6 + 6 + 3 + 6 + 3 + 7 + 3 + 615 + 8 + 7 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3840).

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

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 117875197159 + ... + 117875197721.

It is an arithmetic number, because the mean of its divisors is an integer number (85057212240).

Almost surely, 2^{66363736158720} is an apocalyptic number.

66363736158720 is a gapful number since it is divisible by the number (60) 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 66363736158720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163309847500800).

66363736158720 is an abundant number, since it is smaller than the sum of its proper divisors (260255958842880).

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

66363736158720 is a wasteful number, since it uses less digits than its factorization.

66363736158720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 63.

The spelling of 66363736158720 in words is "sixty-six trillion, three hundred sixty-three billion, seven hundred thirty-six million, one hundred fifty-eight thousand, seven hundred twenty".