320866666877 has 2 divisors, whose sum is σ = 320866666878. Its totient is φ = 320866666876.

The previous prime is 320866666847. The next prime is 320866666919. The reversal of 320866666877 is 778666668023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307460269081 + 13406397796 = 554491^2 + 115786^2 .

It is a cyclic number.

It is not a de Polignac number, because 320866666877 - 2¹⁰ = 320866665853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320866666837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160433333438 + 160433333439.

It is an arithmetic number, because the mean of its divisors is an integer number (160433333439).

Almost surely, 2^320866666877 is an apocalyptic number.

It is an amenable number.

320866666877 is a deficient number, since it is larger than the sum of its proper divisors (1).

320866666877 is an equidigital number, since it uses as much as digits as its factorization.

320866666877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 146313216, while the sum is 65.

The spelling of 320866666877 in words is "three hundred twenty billion, eight hundred sixty-six million, six hundred sixty-six thousand, eight hundred seventy-seven".