1066645161 has 24 divisors (see below), whose sum is σ = 1717204320. Its totient is φ = 634041216.

The previous prime is 1066645157. The next prime is 1066645169. The reversal of 1066645161 is 1615466601.

It is a happy number.

It is not a de Polignac number, because 1066645161 - 2² = 1066645157 is a prime.

It is a super-2 number, since 2×1066645161² = 2275463798969431842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066645169) 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 23 ways as a sum of consecutive naturals, for example, 180555 + ... + 186368.

It is an arithmetic number, because the mean of its divisors is an integer number (71550180).

Almost surely, 2^1066645161 is an apocalyptic number.

It is an amenable number.

1066645161 is a deficient number, since it is larger than the sum of its proper divisors (650559159).

1066645161 is a wasteful number, since it uses less digits than its factorization.

1066645161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366965 (or 366962 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1066645161 is about 32659.5339985126. The cubic root of 1066645161 is about 1021.7390431472.

The spelling of 1066645161 in words is "one billion, sixty-six million, six hundred forty-five thousand, one hundred sixty-one".