1611166666 has 8 divisors (see below), whose sum is σ = 2418143364. Its totient is φ = 805118880.

The previous prime is 1611166657. The next prime is 1611166679. The reversal of 1611166666 is 6666611161.

It can be written as a sum of positive squares in 2 ways, for example, as 1071580225 + 539586441 = 32735^2 + 23229^2 .

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

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, 227875 + ... + 234838.

Almost surely, 2^1611166666 is an apocalyptic number.

1611166666 is a deficient number, since it is larger than the sum of its proper divisors (806976698).

1611166666 is a wasteful number, since it uses less digits than its factorization.

1611166666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464456.

The product of its digits is 46656, while the sum is 40.

The square root of 1611166666 is about 40139.3406273696. The cubic root of 1611166666 is about 1172.3217504908.

The spelling of 1611166666 in words is "one billion, six hundred eleven million, one hundred sixty-six thousand, six hundred sixty-six".