6621872107 has 8 divisors (see below), whose sum is σ = 6634555200. Its totient is φ = 6609201984.

The previous prime is 6621872071. The next prime is 6621872119. The reversal of 6621872107 is 7012781266.

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 6621872107 - 2¹⁵ = 6621839339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6621872107.

It is not an unprimeable number, because it can be changed into a prime (6621872137) 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, 2260878 + ... + 2263804.

It is an arithmetic number, because the mean of its divisors is an integer number (829319400).

Almost surely, 2^6621872107 is an apocalyptic number.

6621872107 is a deficient number, since it is larger than the sum of its proper divisors (12683093).

6621872107 is a wasteful number, since it uses less digits than its factorization.

6621872107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6485.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 6621872107 is about 81374.8862180464. The cubic root of 6621872107 is about 1877.8472517148.

The spelling of 6621872107 in words is "six billion, six hundred twenty-one million, eight hundred seventy-two thousand, one hundred seven".