6651054997 has 4 divisors (see below), whose sum is σ = 6695693100. Its totient is φ = 6606416896.

The previous prime is 6651054979. The next prime is 6651055007. The reversal of 6651054997 is 7994501566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 778744836 + 5872310161 = 27906^2 + 76631^2 .

It is a cyclic number.

It is not a de Polignac number, because 6651054997 - 2¹⁹ = 6650530709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651054497) 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, 22318828 + ... + 22319125.

It is an arithmetic number, because the mean of its divisors is an integer number (1673923275).

Almost surely, 2^6651054997 is an apocalyptic number.

It is an amenable number.

6651054997 is a deficient number, since it is larger than the sum of its proper divisors (44638103).

6651054997 is a wasteful number, since it uses less digits than its factorization.

6651054997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44638102.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The square root of 6651054997 is about 81554.0004966035. Note that the first 3 decimals coincide. The cubic root of 6651054997 is about 1880.6017951387.

The spelling of 6651054997 in words is "six billion, six hundred fifty-one million, fifty-four thousand, nine hundred ninety-seven".