6651006291 has 12 divisors (see below), whose sum is σ = 9623900520. Its totient is φ = 4426208160.

The previous prime is 6651006253. The next prime is 6651006293. The reversal of 6651006291 is 1926001566.

It is not a de Polignac number, because 6651006291 - 2¹⁷ = 6650875219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6651006293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 644265 + ... + 654506.

It is an arithmetic number, because the mean of its divisors is an integer number (801991710).

Almost surely, 2^6651006291 is an apocalyptic number.

6651006291 is a deficient number, since it is larger than the sum of its proper divisors (2972894229).

6651006291 is a wasteful number, since it uses less digits than its factorization.

6651006291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299346 (or 1299343 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 6651006291 is about 81553.7018840960. The cubic root of 6651006291 is about 1880.5972045479.

The spelling of 6651006291 in words is "six billion, six hundred fifty-one million, six thousand, two hundred ninety-one".