6651913 has 6 divisors (see below), whose sum is σ = 7066526. Its totient is φ = 6260352.

The previous prime is 6651907. The next prime is 6651923. The reversal of 6651913 is 3191566.

It can be written as a sum of positive squares in 3 ways, for example, as 2778889 + 3873024 = 1667^2 + 1968^2 .

It is not a de Polignac number, because 6651913 - 2⁹ = 6651401 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6651923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11220 + ... + 11797.

Almost surely, 2^6651913 is an apocalyptic number.

It is an amenable number.

6651913 is a deficient number, since it is larger than the sum of its proper divisors (414613).

6651913 is a wasteful number, since it uses less digits than its factorization.

6651913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23051 (or 23034 counting only the distinct ones).

The product of its digits is 4860, while the sum is 31.

The square root of 6651913 is about 2579.1302797649. The cubic root of 6651913 is about 188.0682659132.

The spelling of 6651913 in words is "six million, six hundred fifty-one thousand, nine hundred thirteen".