305666055 has 32 divisors (see below), whose sum is σ = 550134720. Its totient is φ = 163016064.

The previous prime is 305666027. The next prime is 305666063. The reversal of 305666055 is 550666503.

It is a happy number.

It is not a de Polignac number, because 305666055 - 2¹⁴ = 305649671 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3042 + ... + 24911.

It is an arithmetic number, because the mean of its divisors is an integer number (17191710).

Almost surely, 2^305666055 is an apocalyptic number.

305666055 is a deficient number, since it is larger than the sum of its proper divisors (244468665).

305666055 is an frugal number, since it uses more digits than its factorization.

305666055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27979 (or 27961 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 305666055 is about 17483.3078963908. The cubic root of 305666055 is about 673.6211854294.

The spelling of 305666055 in words is "three hundred five million, six hundred sixty-six thousand, fifty-five".