66242087 has 2 divisors, whose sum is σ = 66242088. Its totient is φ = 66242086.

The previous prime is 66242083. The next prime is 66242089. The reversal of 66242087 is 78024266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66242087 - 2² = 66242083 is a prime.

It is a super-3 number, since 3×66242087³ (a number of 24 digits) contains 333 as substring.

Together with 66242089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66242083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33121043 + 33121044.

It is an arithmetic number, because the mean of its divisors is an integer number (33121044).

Almost surely, 2^66242087 is an apocalyptic number.

66242087 is a deficient number, since it is larger than the sum of its proper divisors (1).

66242087 is an equidigital number, since it uses as much as digits as its factorization.

66242087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 66242087 is about 8138.9241918082. The cubic root of 66242087 is about 404.6175060702.

The spelling of 66242087 in words is "sixty-six million, two hundred forty-two thousand, eighty-seven".