66071507 has 2 divisors, whose sum is σ = 66071508. Its totient is φ = 66071506.

The previous prime is 66071501. The next prime is 66071539. The reversal of 66071507 is 70517066.

It is an a-pointer prime, because the next prime (66071539) can be obtained adding 66071507 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66071507 - 2⁴ = 66071491 is a prime.

It is not a weakly prime, because it can be changed into another prime (66071501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33035753 + 33035754.

It is an arithmetic number, because the mean of its divisors is an integer number (33035754).

Almost surely, 2^66071507 is an apocalyptic number.

66071507 is a deficient number, since it is larger than the sum of its proper divisors (1).

66071507 is an equidigital number, since it uses as much as digits as its factorization.

66071507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 66071507 is about 8128.4381648629. The cubic root of 66071507 is about 404.2698973400.

The spelling of 66071507 in words is "sixty-six million, seventy-one thousand, five hundred seven".