65966869 has 2 divisors, whose sum is σ = 65966870. Its totient is φ = 65966868.

The previous prime is 65966863. The next prime is 65966903. The reversal of 65966869 is 96866956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45400644 + 20566225 = 6738^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 65966869 - 2⁷ = 65966741 is a prime.

It is a super-2 number, since 2×65966869² = 8703255611326322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65966863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32983434 + 32983435.

It is an arithmetic number, because the mean of its divisors is an integer number (32983435).

Almost surely, 2^65966869 is an apocalyptic number.

It is an amenable number.

65966869 is a deficient number, since it is larger than the sum of its proper divisors (1).

65966869 is an equidigital number, since it uses as much as digits as its factorization.

65966869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4199040, while the sum is 55.

The square root of 65966869 is about 8121.9990765821. Note that the first 3 decimals coincide. The cubic root of 65966869 is about 404.0563693688.

It can be divided in two parts, 659 and 66869, that added together give a triangular number (67528 = T₃₆₇).

The spelling of 65966869 in words is "sixty-five million, nine hundred sixty-six thousand, eight hundred sixty-nine".