55166517 has 12 divisors (see below), whose sum is σ = 91068640. Its totient is φ = 31523688.

The previous prime is 55166473. The next prime is 55166521. The reversal of 55166517 is 71566155.

55166517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55166517 - 2¹⁴ = 55150133 is a prime.

It is a super-2 number, since 2×55166517² = 6086689195822578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437767 + ... + 437892.

Almost surely, 2^55166517 is an apocalyptic number.

It is an amenable number.

55166517 is a deficient number, since it is larger than the sum of its proper divisors (35902123).

55166517 is a wasteful number, since it uses less digits than its factorization.

55166517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875672 (or 875669 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 55166517 is about 7427.4165764416. The cubic root of 55166517 is about 380.6786510636.

The spelling of 55166517 in words is "fifty-five million, one hundred sixty-six thousand, five hundred seventeen".