8778007121 has 8 divisors (see below), whose sum is σ = 9454850664. Its totient is φ = 8101393920.

The previous prime is 8778007111. The next prime is 8778007159. The reversal of 8778007121 is 1217008778.

It can be written as a sum of positive squares in 4 ways, for example, as 709476496 + 8068530625 = 26636^2 + 89825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8778007121 - 2²⁶ = 8710898257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8778007111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26081 + ... + 135041.

It is an arithmetic number, because the mean of its divisors is an integer number (1181856333).

Almost surely, 2^8778007121 is an apocalyptic number.

It is an amenable number.

8778007121 is a deficient number, since it is larger than the sum of its proper divisors (676843543).

8778007121 is a wasteful number, since it uses less digits than its factorization.

8778007121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115171.

The product of its (nonzero) digits is 43904, while the sum is 41.

The square root of 8778007121 is about 93691.0194255565. The cubic root of 8778007121 is about 2062.8388861504.

The spelling of 8778007121 in words is "eight billion, seven hundred seventy-eight million, seven thousand, one hundred twenty-one".