6651766480 has 40 divisors (see below), whose sum is σ = 15578268552. Its totient is φ = 2641281024.

The previous prime is 6651766463. The next prime is 6651766489. The reversal of 6651766480 is 846671566.

It can be written as a sum of positive squares in 4 ways, for example, as 563397696 + 6088368784 = 23736^2 + 78028^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651766489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292497 + ... + 314416.

Almost surely, 2^6651766480 is an apocalyptic number.

It is an amenable number.

6651766480 is an abundant number, since it is smaller than the sum of its proper divisors (8926502072).

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

6651766480 is a wasteful number, since it uses less digits than its factorization.

6651766480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607063 (or 607057 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 6651766480 is about 81558.3624161251. The cubic root of 6651766480 is about 1880.6688505908.

The spelling of 6651766480 in words is "six billion, six hundred fifty-one million, seven hundred sixty-six thousand, four hundred eighty".