55556166723 has 16 divisors (see below), whose sum is σ = 76699822080. Its totient is φ = 35727332256.

The previous prime is 55556166689. The next prime is 55556166749. The reversal of 55556166723 is 32766165555.

It is not a de Polignac number, because 55556166723 - 2¹³ = 55556158531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55556166793) 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, 199165 + ... + 388302.

It is an arithmetic number, because the mean of its divisors is an integer number (4793738880).

Almost surely, 2^55556166723 is an apocalyptic number.

55556166723 is a deficient number, since it is larger than the sum of its proper divisors (21143655357).

55556166723 is a wasteful number, since it uses less digits than its factorization.

55556166723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588586.

The product of its digits is 5670000, while the sum is 51.

The spelling of 55556166723 in words is "fifty-five billion, five hundred fifty-six million, one hundred sixty-six thousand, seven hundred twenty-three".