55166773 has 4 divisors (see below), whose sum is σ = 55304748. Its totient is φ = 55028800.

The previous prime is 55166731. The next prime is 55166791. The reversal of 55166773 is 37766155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49885969 + 5280804 = 7063^2 + 2298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55166773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68386 + ... + 69187.

It is an arithmetic number, because the mean of its divisors is an integer number (13826187).

Almost surely, 2^55166773 is an apocalyptic number.

It is an amenable number.

55166773 is a deficient number, since it is larger than the sum of its proper divisors (137975).

55166773 is a wasteful number, since it uses less digits than its factorization.

55166773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137974.

The product of its digits is 132300, while the sum is 40.

The square root of 55166773 is about 7427.4338098700. The cubic root of 55166773 is about 380.6792399086.

The spelling of 55166773 in words is "fifty-five million, one hundred sixty-six thousand, seven hundred seventy-three".