5721721366 has 16 divisors (see below), whose sum is σ = 8920752624. Its totient is φ = 2750000544.

The previous prime is 5721721319. The next prime is 5721721381. The reversal of 5721721366 is 6631271275.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459645 + ... + 471928.

It is an arithmetic number, because the mean of its divisors is an integer number (557547039).

Almost surely, 2^5721721366 is an apocalyptic number.

5721721366 is a deficient number, since it is larger than the sum of its proper divisors (3199031258).

5721721366 is a wasteful number, since it uses less digits than its factorization.

5721721366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931695.

The product of its digits is 105840, while the sum is 40.

The square root of 5721721366 is about 75642.0608259717. The cubic root of 5721721366 is about 1788.5821888766.

The spelling of 5721721366 in words is "five billion, seven hundred twenty-one million, seven hundred twenty-one thousand, three hundred sixty-six".