66687463 has 2 divisors, whose sum is σ = 66687464. Its totient is φ = 66687462.

The previous prime is 66687421. The next prime is 66687469. The reversal of 66687463 is 36478666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66687463 - 2²⁵ = 33133031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66687469) 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, 33343731 + 33343732.

It is an arithmetic number, because the mean of its divisors is an integer number (33343732).

Almost surely, 2^66687463 is an apocalyptic number.

66687463 is a deficient number, since it is larger than the sum of its proper divisors (1).

66687463 is an equidigital number, since it uses as much as digits as its factorization.

66687463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 46.

The square root of 66687463 is about 8166.2392201062. The cubic root of 66687463 is about 405.5222911549.

The spelling of 66687463 in words is "sixty-six million, six hundred eighty-seven thousand, four hundred sixty-three".