66286666 has 8 divisors (see below), whose sum is σ = 100547460. Its totient is φ = 32770848.

The previous prime is 66286657. The next prime is 66286681. The reversal of 66286666 is 66668266.

It can be written as a sum of positive squares in 2 ways, for example, as 48011041 + 18275625 = 6929^2 + 4275^2 .

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

66286666 is a modest number, since divided by 6666 gives 6628 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186021 + ... + 186376.

Almost surely, 2^66286666 is an apocalyptic number.

66286666 is a deficient number, since it is larger than the sum of its proper divisors (34260794).

66286666 is a wasteful number, since it uses less digits than its factorization.

66286666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372488.

The product of its digits is 746496, while the sum is 46.

The square root of 66286666 is about 8141.6623609678. The cubic root of 66286666 is about 404.7082509924.

The spelling of 66286666 in words is "sixty-six million, two hundred eighty-six thousand, six hundred sixty-six".