668614055 has 4 divisors (see below), whose sum is σ = 802336872. Its totient is φ = 534891240.

The previous prime is 668614043. The next prime is 668614069. The reversal of 668614055 is 550416866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550416866 = 2 ⋅275208433.

It is not a de Polignac number, because 668614055 - 2⁴ = 668614039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66861401 + ... + 66861410.

It is an arithmetic number, because the mean of its divisors is an integer number (200584218).

Almost surely, 2^668614055 is an apocalyptic number.

668614055 is a deficient number, since it is larger than the sum of its proper divisors (133722817).

668614055 is a wasteful number, since it uses less digits than its factorization.

668614055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133722816.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 668614055 is about 25857.5724885381. The cubic root of 668614055 is about 874.4302380559.

The spelling of 668614055 in words is "six hundred sixty-eight million, six hundred fourteen thousand, fifty-five".