2198306666 has 8 divisors (see below), whose sum is σ = 3300838020. Its totient is φ = 1098027328.

The previous prime is 2198306657. The next prime is 2198306681. The reversal of 2198306666 is 6666038912.

It can be written as a sum of positive squares in 2 ways, for example, as 2183599441 + 14707225 = 46729^2 + 3835^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2198306666.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 560561 + ... + 564468.

Almost surely, 2^2198306666 is an apocalyptic number.

2198306666 is a deficient number, since it is larger than the sum of its proper divisors (1102531354).

2198306666 is a wasteful number, since it uses less digits than its factorization.

2198306666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126008.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 2198306666 is about 46886.1031223539. The cubic root of 2198306666 is about 1300.2576739722.

The spelling of 2198306666 in words is "two billion, one hundred ninety-eight million, three hundred six thousand, six hundred sixty-six".