666000069 has 8 divisors (see below), whose sum is σ = 1014857280. Its totient is φ = 380571456.

The previous prime is 666000061. The next prime is 666000073. The reversal of 666000069 is 960000666.

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

It is not a de Polignac number, because 666000069 - 2³ = 666000061 is a prime.

It is a super-2 number, since 2×666000069² = 887112183816009522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666000061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15857124 + ... + 15857165.

It is an arithmetic number, because the mean of its divisors is an integer number (126857160).

Almost surely, 2^666000069 is an apocalyptic number.

It is an amenable number.

666000069 is a deficient number, since it is larger than the sum of its proper divisors (348857211).

666000069 is a wasteful number, since it uses less digits than its factorization.

666000069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31714299.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 666000069 is about 25806.9771379757. The cubic root of 666000069 is about 873.2892042882.

The spelling of 666000069 in words is "six hundred sixty-six million, sixty-nine", and thus it is an aban number.