6654780251 has 8 divisors (see below), whose sum is σ = 7679303424. Its totient is φ = 5648717160.

The previous prime is 6654780247. The next prime is 6654780257. The reversal of 6654780251 is 1520874566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6654780251 - 2² = 6654780247 is a prime.

It is a super-2 number, since 2×6654780251² = 88572200378199246002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6654780257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4614245 + ... + 4615686.

It is an arithmetic number, because the mean of its divisors is an integer number (959912928).

Almost surely, 2^6654780251 is an apocalyptic number.

6654780251 is a deficient number, since it is larger than the sum of its proper divisors (1024523173).

6654780251 is a wasteful number, since it uses less digits than its factorization.

6654780251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9230041.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 6654780251 is about 81576.8364856103. The cubic root of 6654780251 is about 1880.9528377829.

The spelling of 6654780251 in words is "six billion, six hundred fifty-four million, seven hundred eighty thousand, two hundred fifty-one".