4454721566 has 4 divisors (see below), whose sum is σ = 6682082352. Its totient is φ = 2227360782.

The previous prime is 4454721563. The next prime is 4454721571. The reversal of 4454721566 is 6651274544.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4454721563) by changing a digit.

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 as a sum of consecutive naturals, namely, 1113680390 + ... + 1113680393.

It is an arithmetic number, because the mean of its divisors is an integer number (1670520588).

Almost surely, 2^4454721566 is an apocalyptic number.

4454721566 is a deficient number, since it is larger than the sum of its proper divisors (2227360786).

4454721566 is a wasteful number, since it uses less digits than its factorization.

4454721566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227360785.

The product of its digits is 806400, while the sum is 44.

The square root of 4454721566 is about 66743.7005716644. The cubic root of 4454721566 is about 1645.4076854056.

The spelling of 4454721566 in words is "four billion, four hundred fifty-four million, seven hundred twenty-one thousand, five hundred sixty-six".