6666553251 has 12 divisors (see below), whose sum is σ = 9717810960. Its totient is φ = 4403594160.

The previous prime is 6666553217. The next prime is 6666553253. The reversal of 6666553251 is 1523556666.

It is not a de Polignac number, because 6666553251 - 2¹⁷ = 6666422179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6666553197 and 6666553206.

It is not an unprimeable number, because it can be changed into a prime (6666553253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3396855 + ... + 3398816.

It is an arithmetic number, because the mean of its divisors is an integer number (809817580).

Almost surely, 2^6666553251 is an apocalyptic number.

6666553251 is a deficient number, since it is larger than the sum of its proper divisors (3051257709).

6666553251 is a wasteful number, since it uses less digits than its factorization.

6666553251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6795786 (or 6795783 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

The square root of 6666553251 is about 81648.9635635383. The cubic root of 6666553251 is about 1882.0613848787.

The spelling of 6666553251 in words is "six billion, six hundred sixty-six million, five hundred fifty-three thousand, two hundred fifty-one".