4451651566 has 4 divisors (see below), whose sum is σ = 6677477352. Its totient is φ = 2225825782.

The previous prime is 4451651557. The next prime is 4451651591. The reversal of 4451651566 is 6651561544.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1112912890 + ... + 1112912893.

It is an arithmetic number, because the mean of its divisors is an integer number (1669369338).

Almost surely, 2^4451651566 is an apocalyptic number.

4451651566 is a deficient number, since it is larger than the sum of its proper divisors (2225825786).

4451651566 is a wasteful number, since it uses less digits than its factorization.

4451651566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225825785.

The product of its digits is 432000, while the sum is 43.

The square root of 4451651566 is about 66720.6981827978. The cubic root of 4451651566 is about 1645.0296174488.

The spelling of 4451651566 in words is "four billion, four hundred fifty-one million, six hundred fifty-one thousand, five hundred sixty-six".