6654398751 has 168 divisors, whose sum is σ = 13513502240. Its totient is φ = 3187071360.

The previous prime is 6654398749. The next prime is 6654398759. The reversal of 6654398751 is 1578934566.

6654398751 is a `hidden beast` number, since 6 + 6 + 543 + 98 + 7 + 5 + 1 = 666.

It is not a de Polignac number, because 6654398751 - 2¹ = 6654398749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6654398759) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 8026605 + ... + 8027433.

Almost surely, 2^6654398751 is an apocalyptic number.

6654398751 is an abundant number, since it is smaller than the sum of its proper divisors (6859103489).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6654398751 is a wasteful number, since it uses less digits than its factorization.

6654398751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 863 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 6654398751 is about 81574.4981657871. The cubic root of 6654398751 is about 1880.9168938352.

The spelling of 6654398751 in words is "six billion, six hundred fifty-four million, three hundred ninety-eight thousand, seven hundred fifty-one".