1231166066 has 16 divisors (see below), whose sum is σ = 2093481600. Its totient is φ = 538323408.

The previous prime is 1231166033. The next prime is 1231166173. The reversal of 1231166066 is 6606611321.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245626 + ... + 1246613.

It is an arithmetic number, because the mean of its divisors is an integer number (130842600).

Almost surely, 2^1231166066 is an apocalyptic number.

1231166066 is a deficient number, since it is larger than the sum of its proper divisors (862315534).

1231166066 is a wasteful number, since it uses less digits than its factorization.

1231166066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492273.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1231166066 is about 35087.9760886831. The cubic root of 1231166066 is about 1071.7797457432.

Adding to 1231166066 its reverse (6606611321), we get a palindrome (7837777387).

The spelling of 1231166066 in words is "one billion, two hundred thirty-one million, one hundred sixty-six thousand, sixty-six".