1066886578501 has 8 divisors (see below), whose sum is σ = 1082763488664. Its totient is φ = 1051043777280.

The previous prime is 1066886578489. The next prime is 1066886578507. The reversal of 1066886578501 is 1058756886601.

It can be written as a sum of positive squares in 4 ways, for example, as 810090002500 + 256796576001 = 900050^2 + 506751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1066886578501 - 2⁹ = 1066886577989 is a prime.

It is a super-2 number, since 2×1066886578501² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1066886578501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066886578507) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8464210 + ... + 8589331.

It is an arithmetic number, because the mean of its divisors is an integer number (135345436083).

Almost surely, 2^{1066886578501} is an apocalyptic number.

It is an amenable number.

1066886578501 is a deficient number, since it is larger than the sum of its proper divisors (15876910163).

1066886578501 is an equidigital number, since it uses as much as digits as its factorization.

1066886578501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17054471.

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 1066886578501 in words is "one trillion, sixty-six billion, eight hundred eighty-six million, five hundred seventy-eight thousand, five hundred one".