668106755 has 8 divisors (see below), whose sum is σ = 802045152. Its totient is φ = 534274048.

The previous prime is 668106689. The next prime is 668106773. The reversal of 668106755 is 557601866.

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

It is a cyclic number.

It is not a de Polignac number, because 668106755 - 2¹⁰ = 668105731 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11774 + ... + 38403.

It is an arithmetic number, because the mean of its divisors is an integer number (100255644).

Almost surely, 2^668106755 is an apocalyptic number.

668106755 is a deficient number, since it is larger than the sum of its proper divisors (133938397).

668106755 is a wasteful number, since it uses less digits than its factorization.

668106755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52845.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 668106755 is about 25847.7611216136. The cubic root of 668106755 is about 874.2090288771.

The spelling of 668106755 in words is "six hundred sixty-eight million, one hundred six thousand, seven hundred fifty-five".