6651671712 has 96 divisors (see below), whose sum is σ = 19974148992. Its totient is φ = 1898655744.

The previous prime is 6651671701. The next prime is 6651671717. The reversal of 6651671712 is 2171761566.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (6651671717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797548 + ... + 805844.

It is an arithmetic number, because the mean of its divisors is an integer number (208064052).

Almost surely, 2^6651671712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6651671712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9987074496).

6651671712 is an abundant number, since it is smaller than the sum of its proper divisors (13322477280).

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

6651671712 is a wasteful number, since it uses less digits than its factorization.

6651671712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9510 (or 9502 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 6651671712 is about 81557.7814313263. The cubic root of 6651671712 is about 1880.6599192253.

The spelling of 6651671712 in words is "six billion, six hundred fifty-one million, six hundred seventy-one thousand, seven hundred twelve".