66455507 has 2 divisors, whose sum is σ = 66455508. Its totient is φ = 66455506.

The previous prime is 66455489. The next prime is 66455531. The reversal of 66455507 is 70555466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66455507 - 2¹⁸ = 66193363 is a prime.

It is not a weakly prime, because it can be changed into another prime (66455107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33227753 + 33227754.

It is an arithmetic number, because the mean of its divisors is an integer number (33227754).

Almost surely, 2^66455507 is an apocalyptic number.

66455507 is a deficient number, since it is larger than the sum of its proper divisors (1).

66455507 is an equidigital number, since it uses as much as digits as its factorization.

66455507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 66455507 is about 8152.0247178232. The cubic root of 66455507 is about 405.0515749997.

The spelling of 66455507 in words is "sixty-six million, four hundred fifty-five thousand, five hundred seven".