66315730160 has 80 divisors (see below), whose sum is σ = 155817125280. Its totient is φ = 26246814720.

The previous prime is 66315730157. The next prime is 66315730163. The reversal of 66315730160 is 6103751366.

It is an interprime number because it is at equal distance from previous prime (66315730157) and next prime (66315730163).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66315730163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2908886 + ... + 2931594.

It is an arithmetic number, because the mean of its divisors is an integer number (1947714066).

Almost surely, 2^66315730160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66315730160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77908562640).

66315730160 is an abundant number, since it is smaller than the sum of its proper divisors (89501395120).

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

66315730160 is a wasteful number, since it uses less digits than its factorization.

66315730160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23106 (or 23100 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 66315730160 in words is "sixty-six billion, three hundred fifteen million, seven hundred thirty thousand, one hundred sixty".