55776771066 has 16 divisors (see below), whose sum is σ = 111556555488. Its totient is φ = 18591754800.

The previous prime is 55776771041. The next prime is 55776771097. The reversal of 55776771066 is 66017767755.

It is a super-2 number, since 2×55776771066² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55776770997 and 55776771015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167796 + ... + 373776.

It is an arithmetic number, because the mean of its divisors is an integer number (6972284718).

Almost surely, 2^55776771066 is an apocalyptic number.

55776771066 is an abundant number, since it is smaller than the sum of its proper divisors (55779784422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55776771066 is a wasteful number, since it uses less digits than its factorization.

55776771066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251117.

The product of its (nonzero) digits is 12965400, while the sum is 57.

The spelling of 55776771066 in words is "fifty-five billion, seven hundred seventy-six million, seven hundred seventy-one thousand, sixty-six".