666000371 has 2 divisors, whose sum is σ = 666000372. Its totient is φ = 666000370.

The previous prime is 666000359. The next prime is 666000473. The reversal of 666000371 is 173000666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666000371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (666000271) 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 as a sum of consecutive naturals, namely, 333000185 + 333000186.

It is an arithmetic number, because the mean of its divisors is an integer number (333000186).

Almost surely, 2^666000371 is an apocalyptic number.

666000371 is a deficient number, since it is larger than the sum of its proper divisors (1).

666000371 is an equidigital number, since it uses as much as digits as its factorization.

666000371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 666000371 is about 25806.9829891059. The cubic root of 666000371 is about 873.2893362869.

The spelling of 666000371 in words is "six hundred sixty-six million, three hundred seventy-one", and thus it is an aban number.