1820000666 has 8 divisors (see below), whose sum is σ = 2978182944. Its totient is φ = 827273020.

The previous prime is 1820000653. The next prime is 1820000711. The reversal of 1820000666 is 6660000281.

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, 41363630 + ... + 41363673.

It is an arithmetic number, because the mean of its divisors is an integer number (372272868).

Almost surely, 2^1820000666 is an apocalyptic number.

1820000666 is a deficient number, since it is larger than the sum of its proper divisors (1158182278).

1820000666 is a wasteful number, since it uses less digits than its factorization.

1820000666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82727316.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1820000666 is about 42661.4658210428. The cubic root of 1820000666 is about 1220.9292986733.

The spelling of 1820000666 in words is "one billion, eight hundred twenty million, six hundred sixty-six", and thus it is an aban number.