6625899064 has 32 divisors (see below), whose sum is σ = 12969551520. Its totient is φ = 3167481856.

The previous prime is 6625899043. The next prime is 6625899079. The reversal of 6625899064 is 4609985266.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6625898996 and 6625899014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482112 + ... + 495664.

It is an arithmetic number, because the mean of its divisors is an integer number (405298485).

Almost surely, 2^6625899064 is an apocalyptic number.

It is an amenable number.

6625899064 is a deficient number, since it is larger than the sum of its proper divisors (6343652456).

6625899064 is a wasteful number, since it uses less digits than its factorization.

6625899064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16239 (or 16235 counting only the distinct ones).

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

The square root of 6625899064 is about 81399.6256993851. The cubic root of 6625899064 is about 1878.2278327970.

The spelling of 6625899064 in words is "six billion, six hundred twenty-five million, eight hundred ninety-nine thousand, sixty-four".