666055165 has 32 divisors (see below), whose sum is σ = 869806080. Its totient is φ = 487964736.

The previous prime is 666055153. The next prime is 666055177. The reversal of 666055165 is 561550666.

It is an interprime number because it is at equal distance from previous prime (666055153) and next prime (666055177).

It is a cyclic number.

It is not a de Polignac number, because 666055165 - 2⁷ = 666055037 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 419964 + ... + 421546.

It is an arithmetic number, because the mean of its divisors is an integer number (27181440).

Almost surely, 2^666055165 is an apocalyptic number.

It is an amenable number.

666055165 is a deficient number, since it is larger than the sum of its proper divisors (203750915).

666055165 is a wasteful number, since it uses less digits than its factorization.

666055165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 666055165 is about 25808.0445791617. The cubic root of 666055165 is about 873.3132850742.

The spelling of 666055165 in words is "six hundred sixty-six million, fifty-five thousand, one hundred sixty-five".