6650872279 has 4 divisors (see below), whose sum is σ = 6663589576. Its totient is φ = 6638154984.

The previous prime is 6650872237. The next prime is 6650872289. The reversal of 6650872279 is 9722780566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6650872279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6650872219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6357864 + ... + 6358909.

It is an arithmetic number, because the mean of its divisors is an integer number (1665897394).

Almost surely, 2^6650872279 is an apocalyptic number.

6650872279 is a deficient number, since it is larger than the sum of its proper divisors (12717297).

6650872279 is a wasteful number, since it uses less digits than its factorization.

6650872279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12717296.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The square root of 6650872279 is about 81552.8802618277. The cubic root of 6650872279 is about 1880.5845736630.

The spelling of 6650872279 in words is "six billion, six hundred fifty million, eight hundred seventy-two thousand, two hundred seventy-nine".