6625984906 has 16 divisors (see below), whose sum is σ = 10528305480. Its totient is φ = 3116723200.

The previous prime is 6625984903. The next prime is 6625984907. The reversal of 6625984906 is 6094895266.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5805678025 + 820306881 = 76195^2 + 28641^2 .

It is not an unprimeable number, because it can be changed into a prime (6625984903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36306 + ... + 120706.

Almost surely, 2^6625984906 is an apocalyptic number.

6625984906 is a deficient number, since it is larger than the sum of its proper divisors (3902320574).

6625984906 is a wasteful number, since it uses less digits than its factorization.

6625984906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86729.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The square root of 6625984906 is about 81400.1529851142. The cubic root of 6625984906 is about 1878.2359439045.

The spelling of 6625984906 in words is "six billion, six hundred twenty-five million, nine hundred eighty-four thousand, nine hundred six".