55687666678655 has 8 divisors (see below), whose sum is σ = 72900218197584. Its totient is φ = 40500121220800.

The previous prime is 55687666678627. The next prime is 55687666678883.

55687666678655 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55687666678655 - 2¹⁰ = 55687666677631 is a prime.

It is a super-2 number, since 2×55687666678655² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506251515206 + ... + 506251515315.

It is an arithmetic number, because the mean of its divisors is an integer number (9112527274698).

Almost surely, 2^{55687666678655} is an apocalyptic number.

55687666678655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55687666678655 is a deficient number, since it is larger than the sum of its proper divisors (17212551518929).

55687666678655 is a wasteful number, since it uses less digits than its factorization.

55687666678655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012503030537.

The product of its digits is 91445760000, while the sum is 86.

The spelling of 55687666678655 in words is "fifty-five trillion, six hundred eighty-seven billion, six hundred sixty-six million, six hundred seventy-eight thousand, six hundred fifty-five".