55772668866 has 16 divisors (see below), whose sum is σ = 112628303424. Its totient is φ = 18410395344.

The previous prime is 55772668843. The next prime is 55772668883. The reversal of 55772668866 is 66886627755.

It is a super-2 number, since 2×55772668866² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55772668797 and 55772668806.

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, 45122901 + ... + 45124136.

It is an arithmetic number, because the mean of its divisors is an integer number (7039268964).

Almost surely, 2^55772668866 is an apocalyptic number.

55772668866 is an abundant number, since it is smaller than the sum of its proper divisors (56855634558).

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

55772668866 is a wasteful number, since it uses less digits than its factorization.

55772668866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90247145.

The product of its digits is 203212800, while the sum is 66.

The spelling of 55772668866 in words is "fifty-five billion, seven hundred seventy-two million, six hundred sixty-eight thousand, eight hundred sixty-six".