1066266558 has 96 divisors (see below), whose sum is σ = 2782375200. Its totient is φ = 301771008.

The previous prime is 1066266527. The next prime is 1066266559. The reversal of 1066266558 is 8556626601.

It is a happy number.

1066266558 is a `hidden beast` number, since 10 + 6 + 626 + 6 + 5 + 5 + 8 = 666.

It is a super-2 number, since 2×1066266558² = 2273848745418334728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066266559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 286566 + ... + 290262.

It is an arithmetic number, because the mean of its divisors is an integer number (28983075).

Almost surely, 2^1066266558 is an apocalyptic number.

1066266558 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066266558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1391187600).

1066266558 is an abundant number, since it is smaller than the sum of its proper divisors (1716108642).

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

1066266558 is a wasteful number, since it uses less digits than its factorization.

1066266558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831 (or 3818 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 1066266558 is about 32653.7372746214. The cubic root of 1066266558 is about 1021.6181409458.

The spelling of 1066266558 in words is "one billion, sixty-six million, two hundred sixty-six thousand, five hundred fifty-eight".