6649755047 has 6 divisors (see below), whose sum is σ = 7200622512. Its totient is φ = 6138235272.

The previous prime is 6649755041. The next prime is 6649755103. The reversal of 6649755047 is 7405579466.

It is not a de Polignac number, because 6649755047 - 2⁸ = 6649754791 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 6649755047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649755041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19673663 + ... + 19674000.

It is an arithmetic number, because the mean of its divisors is an integer number (1200103752).

Almost surely, 2^6649755047 is an apocalyptic number.

6649755047 is a deficient number, since it is larger than the sum of its proper divisors (550867465).

6649755047 is a wasteful number, since it uses less digits than its factorization.

6649755047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39347689 (or 39347676 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 53.

The square root of 6649755047 is about 81546.0302344633. The cubic root of 6649755047 is about 1880.4792658260.

The spelling of 6649755047 in words is "six billion, six hundred forty-nine million, seven hundred fifty-five thousand, forty-seven".