55550166 has 32 divisors (see below), whose sum is σ = 128214528. Its totient is φ = 15716160.

The previous prime is 55550161. The next prime is 55550179. The reversal of 55550166 is 66105555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2095 + ... + 10746.

It is an arithmetic number, because the mean of its divisors is an integer number (4006704).

Almost surely, 2^55550166 is an apocalyptic number.

55550166 is an abundant number, since it is smaller than the sum of its proper divisors (72664362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55550166 is a wasteful number, since it uses less digits than its factorization.

55550166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12956.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 55550166 is about 7453.1983738527. The cubic root of 55550166 is about 381.5590747834.

It can be divided in two parts, 555 and 50166, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 55550166 in words is "fifty-five million, five hundred fifty thousand, one hundred sixty-six".