66071 has 2 divisors, whose sum is σ = 66072. Its totient is φ = 66070.

The previous prime is 66067. The next prime is 66083. The reversal of 66071 is 17066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66071 - 2² = 66067 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33035 + 33036.

It is an arithmetic number, because the mean of its divisors is an integer number (33036).

2⁶⁶⁰⁷¹ is an apocalyptic number.

66071 is a deficient number, since it is larger than the sum of its proper divisors (1).

66071 is an equidigital number, since it uses as much as digits as its factorization.

66071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 66071 is about 257.0427979929. The cubic root of 66071 is about 40.4268863282.

The spelling of 66071 in words is "sixty-six thousand, seventy-one".