1666664814 has 16 divisors (see below), whose sum is σ = 3387975120. Its totient is φ = 546447360.

The previous prime is 1666664809. The next prime is 1666664851. The reversal of 1666664814 is 4184666661.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2276499 + ... + 2277230.

It is an arithmetic number, because the mean of its divisors is an integer number (211748445).

Almost surely, 2^1666664814 is an apocalyptic number.

1666664814 is an abundant number, since it is smaller than the sum of its proper divisors (1721310306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666664814 is a wasteful number, since it uses less digits than its factorization.

1666664814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4553795.

The product of its digits is 995328, while the sum is 48.

The square root of 1666664814 is about 40824.8063559400. The cubic root of 1666664814 is about 1185.6306621807.

The spelling of 1666664814 in words is "one billion, six hundred sixty-six million, six hundred sixty-four thousand, eight hundred fourteen".