66122047 has 2 divisors, whose sum is σ = 66122048. Its totient is φ = 66122046.

The previous prime is 66122029. The next prime is 66122057. The reversal of 66122047 is 74022166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66122047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66122057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33061023 + 33061024.

It is an arithmetic number, because the mean of its divisors is an integer number (33061024).

Almost surely, 2^66122047 is an apocalyptic number.

66122047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66122047 is an equidigital number, since it uses as much as digits as its factorization.

66122047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 66122047 is about 8131.5464088942. The cubic root of 66122047 is about 404.3729503004.

The spelling of 66122047 in words is "sixty-six million, one hundred twenty-two thousand, forty-seven".