66271608852 has 12 divisors (see below), whose sum is σ = 154633754016. Its totient is φ = 22090536280.

The previous prime is 66271608829. The next prime is 66271608881. The reversal of 66271608852 is 25880617266.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×66271608852² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66271608795 and 66271608804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2761317024 + ... + 2761317047.

It is an arithmetic number, because the mean of its divisors is an integer number (12886146168).

Almost surely, 2^66271608852 is an apocalyptic number.

It is an amenable number.

66271608852 is an abundant number, since it is smaller than the sum of its proper divisors (88362145164).

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

66271608852 is a wasteful number, since it uses less digits than its factorization.

66271608852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522634078 (or 5522634076 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 66271608852 in words is "sixty-six billion, two hundred seventy-one million, six hundred eight thousand, eight hundred fifty-two".