867666769 has 2 divisors, whose sum is σ = 867666770. Its totient is φ = 867666768.

The previous prime is 867666733. The next prime is 867666797. The reversal of 867666769 is 967666768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437311744 + 430355025 = 20912^2 + 20745^2 .

It is a cyclic number.

It is not a de Polignac number, because 867666769 - 2¹³ = 867658577 is a prime.

It is a super-2 number, since 2×867666769² = 1505691244053798722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (867666469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433833384 + 433833385.

It is an arithmetic number, because the mean of its divisors is an integer number (433833385).

Almost surely, 2^867666769 is an apocalyptic number.

It is an amenable number.

867666769 is a deficient number, since it is larger than the sum of its proper divisors (1).

867666769 is an equidigital number, since it uses as much as digits as its factorization.

867666769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 61.

The square root of 867666769 is about 29456.1838838638. The cubic root of 867666769 is about 953.7860983516.

Subtracting 867666769 from its reverse (967666768), we obtain a palindrome (99999999).

The spelling of 867666769 in words is "eight hundred sixty-seven million, six hundred sixty-six thousand, seven hundred sixty-nine".