55123616066 has 4 divisors (see below), whose sum is σ = 82685424102. Its totient is φ = 27561808032.

The previous prime is 55123616047. The next prime is 55123616071. The reversal of 55123616066 is 66061632155.

55123616066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 35643552025 + 19480064041 = 188795^2 + 139571^2 .

It is a super-2 number, since 2×55123616066² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13780904015 + ... + 13780904018.

Almost surely, 2^55123616066 is an apocalyptic number.

55123616066 is a deficient number, since it is larger than the sum of its proper divisors (27561808036).

55123616066 is a wasteful number, since it uses less digits than its factorization.

55123616066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27561808035.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 55123616066 in words is "fifty-five billion, one hundred twenty-three million, six hundred sixteen thousand, sixty-six".