6651054989 has 4 divisors (see below), whose sum is σ = 6653302656. Its totient is φ = 6648807324.

The previous prime is 6651054979. The next prime is 6651055007. The reversal of 6651054989 is 9894501566.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6651054989 - 2²⁸ = 6382619533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6651054989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651054919) 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 3 ways as a sum of consecutive naturals, for example, 1119389 + ... + 1125314.

It is an arithmetic number, because the mean of its divisors is an integer number (1663325664).

Almost surely, 2^6651054989 is an apocalyptic number.

It is an amenable number.

6651054989 is a deficient number, since it is larger than the sum of its proper divisors (2247667).

6651054989 is a wasteful number, since it uses less digits than its factorization.

6651054989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247666.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The square root of 6651054989 is about 81554.0004475562. Note that the first 3 decimals coincide. The cubic root of 6651054989 is about 1880.6017943847.

The spelling of 6651054989 in words is "six billion, six hundred fifty-one million, fifty-four thousand, nine hundred eighty-nine".