66150605720 has 64 divisors (see below), whose sum is σ = 150893902080. Its totient is φ = 26097091456.

The previous prime is 66150605711. The next prime is 66150605723. The reversal of 66150605720 is 2750605166.

66150605720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66150605723) 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, 937517 + ... + 1005603.

It is an arithmetic number, because the mean of its divisors is an integer number (2357717220).

Almost surely, 2^66150605720 is an apocalyptic number.

It is an amenable number.

66150605720 is an abundant number, since it is smaller than the sum of its proper divisors (84743296360).

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

66150605720 is a wasteful number, since it uses less digits than its factorization.

66150605720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68432 (or 68428 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 66150605720 in words is "sixty-six billion, one hundred fifty million, six hundred five thousand, seven hundred twenty".