66285879426 has 96 divisors (see below), whose sum is σ = 164865682800. Its totient is φ = 19066908672.

The previous prime is 66285879371. The next prime is 66285879437. The reversal of 66285879426 is 62497858266.

66285879426 is a `hidden beast` number, since 6 + 6 + 2 + 8 + 587 + 9 + 42 + 6 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 10212113025 + 56073766401 = 101055^2 + 236799^2 .

It is a super-2 number, since 2×66285879426² (a number of 22 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 536806 + ... + 648638.

Almost surely, 2^66285879426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66285879426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82432841400).

66285879426 is an abundant number, since it is smaller than the sum of its proper divisors (98579803374).

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

66285879426 is a wasteful number, since it uses less digits than its factorization.

66285879426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112020 (or 112017 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 66285879426 in words is "sixty-six billion, two hundred eighty-five million, eight hundred seventy-nine thousand, four hundred twenty-six".