6651122164 has 12 divisors (see below), whose sum is σ = 11651006500. Its totient is φ = 3322263168.

The previous prime is 6651122141. The next prime is 6651122171. The reversal of 6651122164 is 4612211566.

It can be written as a sum of positive squares in 2 ways, for example, as 1805570064 + 4845552100 = 42492^2 + 69610^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819939 + ... + 828010.

Almost surely, 2^6651122164 is an apocalyptic number.

It is an amenable number.

6651122164 is a deficient number, since it is larger than the sum of its proper divisors (4999884336).

6651122164 is a wasteful number, since it uses less digits than its factorization.

6651122164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648962 (or 1648960 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 6651122164 is about 81554.4122902005. The cubic root of 6651122164 is about 1880.6081256610.

The spelling of 6651122164 in words is "six billion, six hundred fifty-one million, one hundred twenty-two thousand, one hundred sixty-four".