66753487 has 2 divisors, whose sum is σ = 66753488. Its totient is φ = 66753486.

The previous prime is 66753481. The next prime is 66753503. The reversal of 66753487 is 78435766.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66753487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66753481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33376743 + 33376744.

It is an arithmetic number, because the mean of its divisors is an integer number (33376744).

Almost surely, 2^66753487 is an apocalyptic number.

66753487 is a deficient number, since it is larger than the sum of its proper divisors (1).

66753487 is an equidigital number, since it uses as much as digits as its factorization.

66753487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 46.

The square root of 66753487 is about 8170.2807173316. The cubic root of 66753487 is about 405.6560762846.

The spelling of 66753487 in words is "sixty-six million, seven hundred fifty-three thousand, four hundred eighty-seven".