1666670018 has 8 divisors (see below), whose sum is σ = 2692313148. Its totient is φ = 769232304.

The previous prime is 1666670003. The next prime is 1666670023. The reversal of 1666670018 is 8100766661.

It can be written as a sum of positive squares in 2 ways, for example, as 1628687449 + 37982569 = 40357^2 + 6163^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 32051321 + ... + 32051372.

Almost surely, 2^1666670018 is an apocalyptic number.

1666670018 is a deficient number, since it is larger than the sum of its proper divisors (1025643130).

1666670018 is a wasteful number, since it uses less digits than its factorization.

1666670018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64102708.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1666670018 is about 40824.8700916488. The cubic root of 1666670018 is about 1185.6318961852.

The spelling of 1666670018 in words is "one billion, six hundred sixty-six million, six hundred seventy thousand, eighteen".