6520428667 has 2 divisors, whose sum is σ = 6520428668. Its totient is φ = 6520428666.

The previous prime is 6520428619. The next prime is 6520428703. The reversal of 6520428667 is 7668240256.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6520428667 is a prime.

It is not a weakly prime, because it can be changed into another prime (6520438667) 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 as a sum of consecutive naturals, namely, 3260214333 + 3260214334.

It is an arithmetic number, because the mean of its divisors is an integer number (3260214334).

Almost surely, 2^6520428667 is an apocalyptic number.

6520428667 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520428667 is an equidigital number, since it uses as much as digits as its factorization.

6520428667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 46.

The square root of 6520428667 is about 80749.1713084413. The cubic root of 6520428667 is about 1868.2086677706.

The spelling of 6520428667 in words is "six billion, five hundred twenty million, four hundred twenty-eight thousand, six hundred sixty-seven".