55550686 has 4 divisors (see below), whose sum is σ = 83326032. Its totient is φ = 27775342.

The previous prime is 55550641. The next prime is 55550701. The reversal of 55550686 is 68605555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68605555 = 5 ⋅13721111.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13887670 + ... + 13887673.

It is an arithmetic number, because the mean of its divisors is an integer number (20831508).

Almost surely, 2^55550686 is an apocalyptic number.

55550686 is a deficient number, since it is larger than the sum of its proper divisors (27775346).

55550686 is a wasteful number, since it uses less digits than its factorization.

55550686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27775345.

The product of its (nonzero) digits is 180000, while the sum is 40.

The square root of 55550686 is about 7453.2332581236. The cubic root of 55550686 is about 381.5602653595.

The spelling of 55550686 in words is "fifty-five million, five hundred fifty thousand, six hundred eighty-six".