6864777225 has 72 divisors (see below), whose sum is σ = 13585059072. Its totient is φ = 3295987200.

The previous prime is 6864777221. The next prime is 6864777287. The reversal of 6864777225 is 5227774686.

6864777225 is a `hidden beast` number, since 6 + 86 + 477 + 72 + 25 = 666.

It is not a de Polignac number, because 6864777225 - 2² = 6864777221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6864777221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 48960 + ... + 126990.

It is an arithmetic number, because the mean of its divisors is an integer number (188681376).

Almost surely, 2^6864777225 is an apocalyptic number.

It is an amenable number.

6864777225 is a deficient number, since it is larger than the sum of its proper divisors (6720281847).

6864777225 is a wasteful number, since it uses less digits than its factorization.

6864777225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78087 (or 78079 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 54.

The square root of 6864777225 is about 82853.9511731336. The cubic root of 6864777225 is about 1900.5332967440.

The spelling of 6864777225 in words is "six billion, eight hundred sixty-four million, seven hundred seventy-seven thousand, two hundred twenty-five".