66122387 has 2 divisors, whose sum is σ = 66122388. Its totient is φ = 66122386.

The previous prime is 66122369. The next prime is 66122431. The reversal of 66122387 is 78322166.

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-66122387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66122317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33061193 + 33061194.

It is an arithmetic number, because the mean of its divisors is an integer number (33061194).

Almost surely, 2^66122387 is an apocalyptic number.

66122387 is a deficient number, since it is larger than the sum of its proper divisors (1).

66122387 is an equidigital number, since it uses as much as digits as its factorization.

66122387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 66122387 is about 8131.5673150998. The cubic root of 66122387 is about 404.3736433954.

The spelling of 66122387 in words is "sixty-six million, one hundred twenty-two thousand, three hundred eighty-seven".