66507107 has 2 divisors, whose sum is σ = 66507108. Its totient is φ = 66507106.

The previous prime is 66507031. The next prime is 66507109. The reversal of 66507107 is 70170566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66507107 - 2¹² = 66503011 is a prime.

Together with 66507109, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3924428 and since 66507107 and 3924428 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (66507109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33253553 + 33253554.

It is an arithmetic number, because the mean of its divisors is an integer number (33253554).

Almost surely, 2^66507107 is an apocalyptic number.

66507107 is a deficient number, since it is larger than the sum of its proper divisors (1).

66507107 is an equidigital number, since it uses as much as digits as its factorization.

66507107 is an evil number, because the sum of its binary digits is even.

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

The square root of 66507107 is about 8155.1889616366. The cubic root of 66507107 is about 405.1563832393.

The spelling of 66507107 in words is "sixty-six million, five hundred seven thousand, one hundred seven".