1666664358 has 8 divisors (see below), whose sum is σ = 3333328728. Its totient is φ = 555554784.

The previous prime is 1666664357. The next prime is 1666664381. The reversal of 1666664358 is 8534666661.

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

1666664358 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1666664358.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666664353) by changing a digit.

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, 138888691 + ... + 138888702.

It is an arithmetic number, because the mean of its divisors is an integer number (416666091).

Almost surely, 2^1666664358 is an apocalyptic number.

1666664358 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1666664358 is a wasteful number, since it uses less digits than its factorization.

1666664358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277777398.

The product of its digits is 3732480, while the sum is 51.

The square root of 1666664358 is about 40824.8007710999. The cubic root of 1666664358 is about 1185.6305540510.

The spelling of 1666664358 in words is "one billion, six hundred sixty-six million, six hundred sixty-four thousand, three hundred fifty-eight".