6651612612 has 36 divisors (see below), whose sum is σ = 17026638720. Its totient is φ = 2189137392.

The previous prime is 6651612601. The next prime is 6651612641. The reversal of 6651612612 is 2162161566.

6651612612 is a `hidden beast` number, since 6 + 6 + 516 + 126 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1166568 + ... + 1172255.

Almost surely, 2^6651612612 is an apocalyptic number.

It is an amenable number.

6651612612 is an abundant number, since it is smaller than the sum of its proper divisors (10375026108).

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

6651612612 is a wasteful number, since it uses less digits than its factorization.

6651612612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338912 (or 2338907 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 6651612612 is about 81557.4191107100. The cubic root of 6651612612 is about 1880.6543493308.

The spelling of 6651612612 in words is "six billion, six hundred fifty-one million, six hundred twelve thousand, six hundred twelve".