1818661606 has 8 divisors (see below), whose sum is σ = 2728603440. Its totient is φ = 909127128.

The previous prime is 1818661591. The next prime is 1818661631. The reversal of 1818661606 is 6061668181.

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

It is a congruent number.

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, 90421 + ... + 108688.

It is an arithmetic number, because the mean of its divisors is an integer number (341075430).

Almost surely, 2^1818661606 is an apocalyptic number.

1818661606 is a deficient number, since it is larger than the sum of its proper divisors (909941834).

1818661606 is a wasteful number, since it uses less digits than its factorization.

1818661606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203678.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1818661606 is about 42645.7689108779. The cubic root of 1818661606 is about 1220.6297935251.

The spelling of 1818661606 in words is "one billion, eight hundred eighteen million, six hundred sixty-one thousand, six hundred six".