66666666666652 has 24 divisors (see below), whose sum is σ = 125661042350816. Its totient is φ = 30764328717888.

The previous prime is 66666666666647. The next prime is 66666666666737. The reversal of 66666666666652 is 25666666666666.

It is a nialpdrome in base 10.

It is a congruent number.

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, 101796528 + ... + 102449335.

Almost surely, 2^{66666666666652} is an apocalyptic number.

It is an amenable number.

66666666666652 is a deficient number, since it is larger than the sum of its proper divisors (58994375684164).

66666666666652 is a wasteful number, since it uses less digits than its factorization.

66666666666652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204252157 (or 204252155 counting only the distinct ones).

The product of its digits is 21767823360, while the sum is 79.

The spelling of 66666666666652 in words is "sixty-six trillion, six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred fifty-two".