6640225299 has 12 divisors (see below), whose sum is σ = 9592149112. Its totient is φ = 4426488000.

The previous prime is 6640225231. The next prime is 6640225301. The reversal of 6640225299 is 9925220466.

6640225299 is a `hidden beast` number, since 66 + 40 + 22 + 529 + 9 = 666.

It is not a de Polignac number, because 6640225299 - 2⁷ = 6640225171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6640225199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198324 + ... + 229374.

Almost surely, 2^6640225299 is an apocalyptic number.

6640225299 is a deficient number, since it is larger than the sum of its proper divisors (2951923813).

6640225299 is a wasteful number, since it uses less digits than its factorization.

6640225299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54818 (or 54815 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 6640225299 is about 81487.5775747445. The cubic root of 6640225299 is about 1879.5805329241.

The spelling of 6640225299 in words is "six billion, six hundred forty million, two hundred twenty-five thousand, two hundred ninety-nine".