866772667 has 2 divisors, whose sum is σ = 866772668. Its totient is φ = 866772666.

The previous prime is 866772631. The next prime is 866772703. The reversal of 866772667 is 766277668.

It is a balanced prime because it is at equal distance from previous prime (866772631) and next prime (866772703).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866772667 is a prime.

It is not a weakly prime, because it can be changed into another prime (866776667) 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, 433386333 + 433386334.

It is an arithmetic number, because the mean of its divisors is an integer number (433386334).

Almost surely, 2^866772667 is an apocalyptic number.

866772667 is a deficient number, since it is larger than the sum of its proper divisors (1).

866772667 is an equidigital number, since it uses as much as digits as its factorization.

866772667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 55.

The square root of 866772667 is about 29441.0031588599. The cubic root of 866772667 is about 953.4583707117.

The spelling of 866772667 in words is "eight hundred sixty-six million, seven hundred seventy-two thousand, six hundred sixty-seven".