6651434461644 has 72 divisors (see below), whose sum is σ = 19540937445120. Its totient is φ = 1868199505632.

The previous prime is 6651434461591. The next prime is 6651434461681. The reversal of 6651434461644 is 4461644341566.

6651434461644 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 434 + 46 + 164 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 223668024 + ... + 223697759.

It is an arithmetic number, because the mean of its divisors is an integer number (271401908960).

Almost surely, 2^{6651434461644} is an apocalyptic number.

It is an amenable number.

6651434461644 is an abundant number, since it is smaller than the sum of its proper divisors (12889502983476).

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

6651434461644 is a wasteful number, since it uses less digits than its factorization.

6651434461644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447365859 (or 447365854 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 54.

The spelling of 6651434461644 in words is "six trillion, six hundred fifty-one billion, four hundred thirty-four million, four hundred sixty-one thousand, six hundred forty-four".