6649634079 has 72 divisors (see below), whose sum is σ = 11318516352. Its totient is φ = 3728319840.

The previous prime is 6649634051. The next prime is 6649634093. The reversal of 6649634079 is 9704369466.

It is not a de Polignac number, because 6649634079 - 2¹⁵ = 6649601311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649634039) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1534614 + ... + 1538940.

It is an arithmetic number, because the mean of its divisors is an integer number (157201616).

Almost surely, 2^6649634079 is an apocalyptic number.

6649634079 is a deficient number, since it is larger than the sum of its proper divisors (4668882273).

6649634079 is a wasteful number, since it uses less digits than its factorization.

6649634079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425 (or 4403 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The square root of 6649634079 is about 81545.2885150332. The cubic root of 6649634079 is about 1880.4678629400.

The spelling of 6649634079 in words is "six billion, six hundred forty-nine million, six hundred thirty-four thousand, seventy-nine".