66428282466 has 128 divisors (see below), whose sum is σ = 185392704000. Its totient is φ = 17519483520.

The previous prime is 66428282447. The next prime is 66428282471.

66428282466 is a `hidden beast` number, since 66 + 42 + 8 + 2 + 82 + 466 = 666.

66428282466 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66428282466² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102846 + ... + 378726.

It is an arithmetic number, because the mean of its divisors is an integer number (1448380500).

Almost surely, 2^66428282466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66428282466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92696352000).

66428282466 is an abundant number, since it is smaller than the sum of its proper divisors (118964421534).

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

66428282466 is a wasteful number, since it uses less digits than its factorization.

66428282466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275926 (or 275906 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 54.

The spelling of 66428282466 in words is "sixty-six billion, four hundred twenty-eight million, two hundred eighty-two thousand, four hundred sixty-six".