66270287 has 2 divisors, whose sum is σ = 66270288. Its totient is φ = 66270286.

The previous prime is 66270263. The next prime is 66270317. The reversal of 66270287 is 78207266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66270287 - 2¹⁶ = 66204751 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66270287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66270487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33135143 + 33135144.

It is an arithmetic number, because the mean of its divisors is an integer number (33135144).

Almost surely, 2^66270287 is an apocalyptic number.

66270287 is a deficient number, since it is larger than the sum of its proper divisors (1).

66270287 is an equidigital number, since it uses as much as digits as its factorization.

66270287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 66270287 is about 8140.6564231639. The cubic root of 66270287 is about 404.6749146626.

The spelling of 66270287 in words is "sixty-six million, two hundred seventy thousand, two hundred eighty-seven".