2666206612 has 6 divisors (see below), whose sum is σ = 4665861578. Its totient is φ = 1333103304.

The previous prime is 2666206601. The next prime is 2666206619. The reversal of 2666206612 is 2166026662.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2236722436 + 429484176 = 47294^2 + 20724^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666206619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333275823 + ... + 333275830.

Almost surely, 2^2666206612 is an apocalyptic number.

It is an amenable number.

2666206612 is a deficient number, since it is larger than the sum of its proper divisors (1999654966).

2666206612 is a wasteful number, since it uses less digits than its factorization.

2666206612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666551657 (or 666551655 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 2666206612 is about 51635.3232971384. The cubic root of 2666206612 is about 1386.6427980924.

The spelling of 2666206612 in words is "two billion, six hundred sixty-six million, two hundred six thousand, six hundred twelve".