666033665 has 16 divisors (see below), whose sum is σ = 892178496. Its totient is φ = 473121600.

The previous prime is 666033659. The next prime is 666033671. The reversal of 666033665 is 566330666.

666033665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666033659) and next prime (666033671).

It is not a de Polignac number, because 666033665 - 2⁸ = 666033409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138446 + ... + 143175.

It is an arithmetic number, because the mean of its divisors is an integer number (55761156).

Almost surely, 2^666033665 is an apocalyptic number.

It is an amenable number.

666033665 is a deficient number, since it is larger than the sum of its proper divisors (226144831).

666033665 is a wasteful number, since it uses less digits than its factorization.

666033665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281680.

The product of its (nonzero) digits is 349920, while the sum is 41.

The square root of 666033665 is about 25807.6280390120. The cubic root of 666033665 is about 873.3038882361.

The spelling of 666033665 in words is "six hundred sixty-six million, thirty-three thousand, six hundred sixty-five".