6512660251 has 4 divisors (see below), whose sum is σ = 6521426352. Its totient is φ = 6503894152.

The previous prime is 6512660227. The next prime is 6512660257. The reversal of 6512660251 is 1520662156.

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

It is a cyclic number.

It is not a de Polignac number, because 6512660251 - 2²¹ = 6510563099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6512660257) 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, 4381936 + ... + 4383421.

It is an arithmetic number, because the mean of its divisors is an integer number (1630356588).

Almost surely, 2^6512660251 is an apocalyptic number.

6512660251 is a deficient number, since it is larger than the sum of its proper divisors (8766101).

6512660251 is an equidigital number, since it uses as much as digits as its factorization.

6512660251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8766100.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 6512660251 is about 80701.0548320157. The cubic root of 6512660251 is about 1867.4664471665.

The spelling of 6512660251 in words is "six billion, five hundred twelve million, six hundred sixty thousand, two hundred fifty-one".