65855287 has 2 divisors, whose sum is σ = 65855288. Its totient is φ = 65855286.

The previous prime is 65855261. The next prime is 65855291. The reversal of 65855287 is 78255856.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65855287 - 2¹¹ = 65853239 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65855087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32927643 + 32927644.

It is an arithmetic number, because the mean of its divisors is an integer number (32927644).

Almost surely, 2^65855287 is an apocalyptic number.

65855287 is a deficient number, since it is larger than the sum of its proper divisors (1).

65855287 is an equidigital number, since it uses as much as digits as its factorization.

65855287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672000, while the sum is 46.

The square root of 65855287 is about 8115.1270476808. The cubic root of 65855287 is about 403.8284223056.

It can be divided in two parts, 658 and 55287, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 65855287 in words is "sixty-five million, eight hundred fifty-five thousand, two hundred eighty-seven".