6557205501 has 96 divisors (see below), whose sum is σ = 12846310400. Its totient is φ = 3226845600.

The previous prime is 6557205491. The next prime is 6557205521. The reversal of 6557205501 is 1055027556.

It is a happy number.

It is not a de Polignac number, because 6557205501 - 2⁵ = 6557205469 is a prime.

It is a super-2 number, since 2×6557205501² = 85993887964689322002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557205521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 426966 + ... + 442056.

Almost surely, 2^6557205501 is an apocalyptic number.

It is an amenable number.

6557205501 is a deficient number, since it is larger than the sum of its proper divisors (6289104899).

6557205501 is a wasteful number, since it uses less digits than its factorization.

6557205501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15148 (or 15131 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 6557205501 is about 80976.5737790875. The cubic root of 6557205501 is about 1871.7144714706.

The spelling of 6557205501 in words is "six billion, five hundred fifty-seven million, two hundred five thousand, five hundred one".