6557400466557 has 4 divisors (see below), whose sum is σ = 8743200622080. Its totient is φ = 4371600311036.

The previous prime is 6557400466537. The next prime is 6557400466559. The reversal of 6557400466557 is 7556640047556.

It is a happy number.

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 6557400466557 - 2⁶ = 6557400466493 is a prime.

It is a super-2 number, since 2×6557400466557² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6557400466557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557400466559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092900077757 + ... + 1092900077762.

It is an arithmetic number, because the mean of its divisors is an integer number (2185800155520).

Almost surely, 2^{6557400466557} is an apocalyptic number.

It is an amenable number.

6557400466557 is a deficient number, since it is larger than the sum of its proper divisors (2185800155523).

6557400466557 is a wasteful number, since it uses less digits than its factorization.

6557400466557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185800155522.

The product of its (nonzero) digits is 105840000, while the sum is 60.

The spelling of 6557400466557 in words is "six trillion, five hundred fifty-seven billion, four hundred million, four hundred sixty-six thousand, five hundred fifty-seven".