4991303666 has 8 divisors (see below), whose sum is σ = 7927364700. Its totient is φ = 2348848768.

The previous prime is 4991303657. The next prime is 4991303671. The reversal of 4991303666 is 6663031994.

It can be written as a sum of positive squares in 2 ways, for example, as 4130761441 + 860542225 = 64271^2 + 29335^2 .

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

It is a super-2 number, since 2×4991303666² = 49826224572450079112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4991303666.

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, 73401491 + ... + 73401558.

Almost surely, 2^4991303666 is an apocalyptic number.

4991303666 is a deficient number, since it is larger than the sum of its proper divisors (2936061034).

4991303666 is a wasteful number, since it uses less digits than its factorization.

4991303666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146803068.

The product of its (nonzero) digits is 629856, while the sum is 47.

The square root of 4991303666 is about 70649.1589900404. The cubic root of 4991303666 is about 1708.9840032385.

The spelling of 4991303666 in words is "four billion, nine hundred ninety-one million, three hundred three thousand, six hundred sixty-six".