6557823878 has 16 divisors (see below), whose sum is σ = 10025169120. Its totient is φ = 3216135936.

The previous prime is 6557823869. The next prime is 6557823887. The reversal of 6557823878 is 8783287556.

It is an interprime number because it is at equal distance from previous prime (6557823869) and next prime (6557823887).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515126 + ... + 527702.

It is an arithmetic number, because the mean of its divisors is an integer number (626573070).

Almost surely, 2^6557823878 is an apocalyptic number.

6557823878 is a deficient number, since it is larger than the sum of its proper divisors (3467345242).

6557823878 is a wasteful number, since it uses less digits than its factorization.

6557823878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17551.

The product of its digits is 22579200, while the sum is 59.

The square root of 6557823878 is about 80980.3919353321. The cubic root of 6557823878 is about 1871.7733069404.

The spelling of 6557823878 in words is "six billion, five hundred fifty-seven million, eight hundred twenty-three thousand, eight hundred seventy-eight".