55166919 has 8 divisors (see below), whose sum is σ = 73808112. Its totient is φ = 36651840.

The previous prime is 55166911. The next prime is 55166933. The reversal of 55166919 is 91966155.

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

It is not a de Polignac number, because 55166919 - 2³ = 55166911 is a prime.

It is a super-2 number, since 2×55166919² = 6086777903905122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30502 + ... + 32259.

It is an arithmetic number, because the mean of its divisors is an integer number (9226014).

Almost surely, 2^55166919 is an apocalyptic number.

55166919 is a deficient number, since it is larger than the sum of its proper divisors (18641193).

55166919 is a wasteful number, since it uses less digits than its factorization.

55166919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63057.

The product of its digits is 72900, while the sum is 42.

The square root of 55166919 is about 7427.4436382917. The cubic root of 55166919 is about 380.6795757335.

The spelling of 55166919 in words is "fifty-five million, one hundred sixty-six thousand, nine hundred nineteen".