66630315760 has 40 divisors (see below), whose sum is σ = 154927070640. Its totient is φ = 26650132992.

The previous prime is 66630315733. The next prime is 66630315769. The reversal of 66630315760 is 6751303666.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66630315769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1533211 + ... + 1576069.

It is an arithmetic number, because the mean of its divisors is an integer number (3873176766).

Almost surely, 2^66630315760 is an apocalyptic number.

It is an amenable number.

66630315760 is an abundant number, since it is smaller than the sum of its proper divisors (88296754880).

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

66630315760 is a wasteful number, since it uses less digits than its factorization.

66630315760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62305 (or 62299 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 43.

The spelling of 66630315760 in words is "sixty-six billion, six hundred thirty million, three hundred fifteen thousand, seven hundred sixty".