55665166 has 8 divisors (see below), whose sum is σ = 83545200. Its totient is φ = 27816768.

The previous prime is 55665163. The next prime is 55665179. The reversal of 55665166 is 66156655.

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

It is a super-2 number, since 2×55665166² = 6197221411615112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55665163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2866 + ... + 10933.

It is an arithmetic number, because the mean of its divisors is an integer number (10443150).

Almost surely, 2^55665166 is an apocalyptic number.

55665166 is a deficient number, since it is larger than the sum of its proper divisors (27880034).

55665166 is a wasteful number, since it uses less digits than its factorization.

55665166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15818.

The product of its digits is 162000, while the sum is 40.

The square root of 55665166 is about 7460.9091939254. The cubic root of 55665166 is about 381.8221946015.

The spelling of 55665166 in words is "fifty-five million, six hundred sixty-five thousand, one hundred sixty-six".