65667263989 has 2 divisors, whose sum is σ = 65667263990. Its totient is φ = 65667263988.

The previous prime is 65667263971. The next prime is 65667264001. The reversal of 65667263989 is 98936276656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44124363364 + 21542900625 = 210058^2 + 146775^2 .

It is a cyclic number.

It is not a de Polignac number, because 65667263989 - 2⁵ = 65667263957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65667266989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32833631994 + 32833631995.

It is an arithmetic number, because the mean of its divisors is an integer number (32833631995).

Almost surely, 2^65667263989 is an apocalyptic number.

It is an amenable number.

65667263989 is a deficient number, since it is larger than the sum of its proper divisors (1).

65667263989 is an equidigital number, since it uses as much as digits as its factorization.

65667263989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176359680, while the sum is 67.

The spelling of 65667263989 in words is "sixty-five billion, six hundred sixty-seven million, two hundred sixty-three thousand, nine hundred eighty-nine".