2666686852 has 6 divisors (see below), whose sum is σ = 4666701998. Its totient is φ = 1333343424.

The previous prime is 2666686837. The next prime is 2666686859. The reversal of 2666686852 is 2586866662.

2666686852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2038883716 + 627803136 = 45154^2 + 25056^2 .

It is a super-2 number, since 2×2666686852² = 14222437533259339808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2666686793 and 2666686802.

It is not an unprimeable number, because it can be changed into a prime (2666686859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333335853 + ... + 333335860.

Almost surely, 2^2666686852 is an apocalyptic number.

It is an amenable number.

2666686852 is a deficient number, since it is larger than the sum of its proper divisors (2000015146).

2666686852 is a wasteful number, since it uses less digits than its factorization.

2666686852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666671717 (or 666671715 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The square root of 2666686852 is about 51639.9733927120. The cubic root of 2666686852 is about 1386.7260476246.

The spelling of 2666686852 in words is "two billion, six hundred sixty-six million, six hundred eighty-six thousand, eight hundred fifty-two".