6651450541566 has 64 divisors (see below), whose sum is σ = 15122901657600. Its totient is φ = 2166215190048.

The previous prime is 6651450541543. The next prime is 6651450541573.

6651450541566 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 45 + 0 + 541 + 56 + 6 = 666.

6651450541566 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4178026 + ... + 5546061.

It is an arithmetic number, because the mean of its divisors is an integer number (236295338400).

Almost surely, 2^{6651450541566} is an apocalyptic number.

6651450541566 is an abundant number, since it is smaller than the sum of its proper divisors (8471451116034).

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

6651450541566 is a wasteful number, since it uses less digits than its factorization.

6651450541566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9724390 (or 9724384 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 54.

The spelling of 6651450541566 in words is "six trillion, six hundred fifty-one billion, four hundred fifty million, five hundred forty-one thousand, five hundred sixty-six".