6666611606 has 4 divisors (see below), whose sum is σ = 9999917412. Its totient is φ = 3333305802.

The previous prime is 6666611587. The next prime is 6666611629. The reversal of 6666611606 is 6061166666.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1666652900 + ... + 1666652903.

It is an arithmetic number, because the mean of its divisors is an integer number (2499979353).

Almost surely, 2^6666611606 is an apocalyptic number.

6666611606 is a deficient number, since it is larger than the sum of its proper divisors (3333305806).

6666611606 is a wasteful number, since it uses less digits than its factorization.

6666611606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333305805.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 6666611606 is about 81649.3209157308. The cubic root of 6666611606 is about 1882.0668763407.

The spelling of 6666611606 in words is "six billion, six hundred sixty-six million, six hundred eleven thousand, six hundred six".