5721010666 has 8 divisors (see below), whose sum is σ = 9807446880. Its totient is φ = 2451861708.

The previous prime is 5721010651. The next prime is 5721010693. The reversal of 5721010666 is 6660101275.

It is a happy number.

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

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, 204321796 + ... + 204321823.

It is an arithmetic number, because the mean of its divisors is an integer number (1225930860).

Almost surely, 2^5721010666 is an apocalyptic number.

5721010666 is a deficient number, since it is larger than the sum of its proper divisors (4086436214).

5721010666 is a wasteful number, since it uses less digits than its factorization.

5721010666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408643628.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 5721010666 is about 75637.3628969176. The cubic root of 5721010666 is about 1788.5081320259.

It can be divided in two parts, 57210 and 10666, that added together give a palindrome (67876).

The spelling of 5721010666 in words is "five billion, seven hundred twenty-one million, ten thousand, six hundred sixty-six".