166246819 has 2 divisors, whose sum is σ = 166246820. Its totient is φ = 166246818.

The previous prime is 166246811. The next prime is 166246853. The reversal of 166246819 is 918642661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166246819 - 2³ = 166246811 is a prime.

It is a super-2 number, since 2×166246819² = 55276009655237522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166246811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83123409 + 83123410.

It is an arithmetic number, because the mean of its divisors is an integer number (83123410).

Almost surely, 2^166246819 is an apocalyptic number.

166246819 is a deficient number, since it is larger than the sum of its proper divisors (1).

166246819 is an equidigital number, since it uses as much as digits as its factorization.

166246819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 166246819 is about 12893.6736037485. The cubic root of 166246819 is about 549.8587174298.

The spelling of 166246819 in words is "one hundred sixty-six million, two hundred forty-six thousand, eight hundred nineteen".