166823011 has 2 divisors, whose sum is σ = 166823012. Its totient is φ = 166823010.

The previous prime is 166823003. The next prime is 166823077. The reversal of 166823011 is 110328661.

It is a weak prime.

It is an emirp because it is prime and its reverse (110328661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166823011 - 2³ = 166823003 is a prime.

It is a super-2 number, since 2×166823011² = 55659833998212242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166823911) by changing a digit.

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 as a sum of consecutive naturals, namely, 83411505 + 83411506.

It is an arithmetic number, because the mean of its divisors is an integer number (83411506).

Almost surely, 2^166823011 is an apocalyptic number.

166823011 is a deficient number, since it is larger than the sum of its proper divisors (1).

166823011 is an equidigital number, since it uses as much as digits as its factorization.

166823011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 166823011 is about 12915.9982579745. The cubic root of 166823011 is about 550.4932335747.

The spelling of 166823011 in words is "one hundred sixty-six million, eight hundred twenty-three thousand, eleven".