55664066 has 4 divisors (see below), whose sum is σ = 83496102. Its totient is φ = 27832032.

The previous prime is 55664057. The next prime is 55664083. The reversal of 55664066 is 66046655.

55664066 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, and also an emirpimes, since its reverse is a distinct semiprime: 66046655 = 5 ⋅13209331.

It can be written as a sum of positive squares in only one way, i.e., 42523441 + 13140625 = 6521^2 + 3625^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13916015 + ... + 13916018.

Almost surely, 2^55664066 is an apocalyptic number.

55664066 is a deficient number, since it is larger than the sum of its proper divisors (27832036).

55664066 is a wasteful number, since it uses less digits than its factorization.

55664066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27832035.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 55664066 is about 7460.8354760040. The cubic root of 55664066 is about 381.8196795207.

The spelling of 55664066 in words is "fifty-five million, six hundred sixty-four thousand, sixty-six".