666266606 has 8 divisors (see below), whose sum is σ = 999995304. Its totient is φ = 332934840.

The previous prime is 666266593. The next prime is 666266609. The reversal of 666266606 is 606662666.

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

It is a super-2 number, since 2×666266606² = 887822380541518472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666266609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95000 + ... + 101771.

It is an arithmetic number, because the mean of its divisors is an integer number (124999413).

Almost surely, 2^666266606 is an apocalyptic number.

666266606 is a deficient number, since it is larger than the sum of its proper divisors (333728698).

666266606 is a wasteful number, since it uses less digits than its factorization.

666266606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198466.

The product of its (nonzero) digits is 559872, while the sum is 44.

The square root of 666266606 is about 25812.1406706224. The cubic root of 666266606 is about 873.4056871793.

The spelling of 666266606 in words is "six hundred sixty-six million, two hundred sixty-six thousand, six hundred six".