66128070137320 has 64 divisors (see below), whose sum is σ = 150394980003840. Its totient is φ = 26167024512000.

The previous prime is 66128070137279. The next prime is 66128070137321. The reversal of 66128070137320 is 2373107082166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66128070137321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21258792 + ... + 24170071.

It is an arithmetic number, because the mean of its divisors is an integer number (2349921562560).

Almost surely, 2^{66128070137320} is an apocalyptic number.

It is an amenable number.

66128070137320 is an abundant number, since it is smaller than the sum of its proper divisors (84266909866520).

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

66128070137320 is a wasteful number, since it uses less digits than its factorization.

66128070137320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45429266 (or 45429262 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 66128070137320 in words is "sixty-six trillion, one hundred twenty-eight billion, seventy million, one hundred thirty-seven thousand, three hundred twenty".