1663066266 has 8 divisors (see below), whose sum is σ = 3326132544. Its totient is φ = 554355420.

The previous prime is 1663066253. The next prime is 1663066291. The reversal of 1663066266 is 6626603661.

It is a happy number.

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

1663066266 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138588850 + ... + 138588861.

It is an arithmetic number, because the mean of its divisors is an integer number (415766568).

Almost surely, 2^1663066266 is an apocalyptic number.

1663066266 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.

1663066266 is a wasteful number, since it uses less digits than its factorization.

1663066266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277177716.

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 1663066266 is about 40780.7094837743. The cubic root of 1663066266 is about 1184.7767365882.

The spelling of 1663066266 in words is "one billion, six hundred sixty-three million, sixty-six thousand, two hundred sixty-six".