166000819 has 2 divisors, whose sum is σ = 166000820. Its totient is φ = 166000818.

The previous prime is 166000817. The next prime is 166000921. The reversal of 166000819 is 918000661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166000819 - 2¹ = 166000817 is a prime.

It is a super-2 number, since 2×166000819² = 55112543817341522, which contains 22 as substring.

Together with 166000817, it forms a pair of twin primes.

166000819 is a modest number, since divided by 819 gives 166 as remainder.

It is not a weakly prime, because it can be changed into another prime (166000817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83000409 + 83000410.

It is an arithmetic number, because the mean of its divisors is an integer number (83000410).

Almost surely, 2^166000819 is an apocalyptic number.

166000819 is a deficient number, since it is larger than the sum of its proper divisors (1).

166000819 is an equidigital number, since it uses as much as digits as its factorization.

166000819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 166000819 is about 12884.1305100500. The cubic root of 166000819 is about 549.5873698460.

The spelling of 166000819 in words is "one hundred sixty-six million, eight hundred nineteen", and thus it is an aban number.