6520570966457 has 4 divisors (see below), whose sum is σ = 6863758912080. Its totient is φ = 6177383020836.

The previous prime is 6520570966421. The next prime is 6520570966499. The reversal of 6520570966457 is 7546690750256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6520570966457 - 2¹⁴ = 6520570950073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6520570966457.

It is not an unprimeable number, because it can be changed into a prime (6520570960457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171593972783 + ... + 171593972820.

It is an arithmetic number, because the mean of its divisors is an integer number (1715939728020).

Almost surely, 2^{6520570966457} is an apocalyptic number.

It is an amenable number.

6520570966457 is a deficient number, since it is larger than the sum of its proper divisors (343187945623).

6520570966457 is a wasteful number, since it uses less digits than its factorization.

6520570966457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343187945622.

The product of its (nonzero) digits is 95256000, while the sum is 62.

The spelling of 6520570966457 in words is "six trillion, five hundred twenty billion, five hundred seventy million, nine hundred sixty-six thousand, four hundred fifty-seven".