66634582722 has 16 divisors (see below), whose sum is σ = 133272028992. Its totient is φ = 22211050320.

The previous prime is 66634582697. The next prime is 66634582783. The reversal of 66634582722 is 22728543666.

66634582722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66634582722² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292572 + ... + 467832.

It is an arithmetic number, because the mean of its divisors is an integer number (8329501812).

Almost surely, 2^66634582722 is an apocalyptic number.

66634582722 is an abundant number, since it is smaller than the sum of its proper divisors (66637446270).

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

66634582722 is a wasteful number, since it uses less digits than its factorization.

66634582722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238633.

The product of its digits is 5806080, while the sum is 51.

The spelling of 66634582722 in words is "sixty-six billion, six hundred thirty-four million, five hundred eighty-two thousand, seven hundred twenty-two".