666655105 has 8 divisors (see below), whose sum is σ = 802593792. Its totient is φ = 531585648.

The previous prime is 666655091. The next prime is 666655117. The reversal of 666655105 is 501556666.

666655105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666655105 is a prime.

It is a super-2 number, since 2×666655105² = 888858058045122050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215617 + ... + 218686.

It is an arithmetic number, because the mean of its divisors is an integer number (100324224).

Almost surely, 2^666655105 is an apocalyptic number.

It is an amenable number.

666655105 is a deficient number, since it is larger than the sum of its proper divisors (135938687).

666655105 is a wasteful number, since it uses less digits than its factorization.

666655105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434615.

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

The square root of 666655105 is about 25819.6650830331. The cubic root of 666655105 is about 873.5754146840.

The spelling of 666655105 in words is "six hundred sixty-six million, six hundred fifty-five thousand, one hundred five".