666029166 has 32 divisors (see below), whose sum is σ = 1454571648. Its totient is φ = 201630240.

The previous prime is 666029159. The next prime is 666029191. The reversal of 666029166 is 661920666.

It is a super-3 number, since 3×666029166³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72420 + ... + 81096.

It is an arithmetic number, because the mean of its divisors is an integer number (45455364).

Almost surely, 2^666029166 is an apocalyptic number.

666029166 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

666029166 is an abundant number, since it is smaller than the sum of its proper divisors (788542482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666029166 is a wasteful number, since it uses less digits than its factorization.

666029166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9856.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 666029166 is about 25807.5408747133. The cubic root of 666029166 is about 873.3019218675.

The spelling of 666029166 in words is "six hundred sixty-six million, twenty-nine thousand, one hundred sixty-six".