8775320866421 has 4 divisors (see below), whose sum is σ = 8775328051500. Its totient is φ = 8775313681344.

The previous prime is 8775320866349. The next prime is 8775320866427. The reversal of 8775320866421 is 1246680235778.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 918455806321 + 7856865060100 = 958361^2 + 2803010^2 .

It is a cyclic number.

It is not a de Polignac number, because 8775320866421 - 2²² = 8775316672117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8775320866427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252466 + ... + 4372563.

It is an arithmetic number, because the mean of its divisors is an integer number (2193832012875).

Almost surely, 2^{8775320866421} is an apocalyptic number.

It is an amenable number.

8775320866421 is a deficient number, since it is larger than the sum of its proper divisors (7185079).

8775320866421 is a wasteful number, since it uses less digits than its factorization.

8775320866421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7185078.

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 8775320866421 in words is "eight trillion, seven hundred seventy-five billion, three hundred twenty million, eight hundred sixty-six thousand, four hundred twenty-one".