6649877247 has 8 divisors (see below), whose sum is σ = 9548541744. Its totient is φ = 4092232128.

The previous prime is 6649877243. The next prime is 6649877251. The reversal of 6649877247 is 7427789466.

It is an interprime number because it is at equal distance from previous prime (6649877243) and next prime (6649877251).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6649877247 - 2² = 6649877243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649877243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85254798 + ... + 85254875.

It is an arithmetic number, because the mean of its divisors is an integer number (1193567718).

Almost surely, 2^6649877247 is an apocalyptic number.

6649877247 is a deficient number, since it is larger than the sum of its proper divisors (2898664497).

6649877247 is a wasteful number, since it uses less digits than its factorization.

6649877247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170509689.

The product of its digits is 28449792, while the sum is 60.

The square root of 6649877247 is about 81546.7795010937. The cubic root of 6649877247 is about 1880.4907847043.

The spelling of 6649877247 in words is "six billion, six hundred forty-nine million, eight hundred seventy-seven thousand, two hundred forty-seven".