1066181203601 has 4 divisors (see below), whose sum is σ = 1067997526512. Its totient is φ = 1064364880692.

The previous prime is 1066181203597. The next prime is 1066181203603. The reversal of 1066181203601 is 1063021816601.

1066181203601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1066181203601 - 2² = 1066181203597 is a prime.

It is a super-2 number, since 2×1066181203601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066181203603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908160575 + ... + 908161748.

It is an arithmetic number, because the mean of its divisors is an integer number (266999381628).

Almost surely, 2^{1066181203601} is an apocalyptic number.

It is an amenable number.

1066181203601 is a deficient number, since it is larger than the sum of its proper divisors (1816322911).

1066181203601 is an equidigital number, since it uses as much as digits as its factorization.

1066181203601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816322910.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 1066181203601 in words is "one trillion, sixty-six billion, one hundred eighty-one million, two hundred three thousand, six hundred one".