4551966720 has 640 divisors, whose sum is σ = 19031364000. Its totient is φ = 1040449536.

The previous prime is 4551966719. The next prime is 4551966763. The reversal of 4551966720 is 276691554.

4551966720 is a `hidden beast` number, since 4 + 5 + 519 + 66 + 72 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 650280957 + ... + 650280963.

Almost surely, 2^4551966720 is an apocalyptic number.

4551966720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4551966720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9515682000).

4551966720 is an abundant number, since it is smaller than the sum of its proper divisors (14479397280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4551966720 is an frugal number, since it uses more digits than its factorization.

4551966720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 4551966720 is about 67468.2645397079. The cubic root of 4551966720 is about 1657.2945139501.

The spelling of 4551966720 in words is "four billion, five hundred fifty-one million, nine hundred sixty-six thousand, seven hundred twenty".