1666818334 has 8 divisors (see below), whose sum is σ = 2508115608. Its totient is φ = 830779800.

The previous prime is 1666818313. The next prime is 1666818337. The reversal of 1666818334 is 4338186661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666818337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313892 + ... + 1315159.

It is an arithmetic number, because the mean of its divisors is an integer number (313514451).

Almost surely, 2^1666818334 is an apocalyptic number.

1666818334 is a deficient number, since it is larger than the sum of its proper divisors (841297274).

1666818334 is a wasteful number, since it uses less digits than its factorization.

1666818334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629370.

The product of its digits is 497664, while the sum is 46.

The square root of 1666818334 is about 40826.6865420156. The cubic root of 1666818334 is about 1185.6670647073.

The spelling of 1666818334 in words is "one billion, six hundred sixty-six million, eight hundred eighteen thousand, three hundred thirty-four".