66752747 has 2 divisors, whose sum is σ = 66752748. Its totient is φ = 66752746.

The previous prime is 66752743. The next prime is 66752779. The reversal of 66752747 is 74725766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66752747 - 2² = 66752743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66752698 and 66752707.

It is not a weakly prime, because it can be changed into another prime (66752743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33376373 + 33376374.

It is an arithmetic number, because the mean of its divisors is an integer number (33376374).

Almost surely, 2^66752747 is an apocalyptic number.

66752747 is a deficient number, since it is larger than the sum of its proper divisors (1).

66752747 is an equidigital number, since it uses as much as digits as its factorization.

66752747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 44.

The square root of 66752747 is about 8170.2354311244. The cubic root of 66752747 is about 405.6545773037.

The spelling of 66752747 in words is "sixty-six million, seven hundred fifty-two thousand, seven hundred forty-seven".