666066668331 has 8 divisors (see below), whose sum is σ = 890562677760. Its totient is φ = 442807552232.

The previous prime is 666066668291. The next prime is 666066668347. The reversal of 666066668331 is 133866660666.

666066668331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 666066668331 - 2⁷ = 666066668203 is a prime.

It is a super-2 number, since 2×666066668331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666066668431) 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, 309222075 + ... + 309224228.

It is an arithmetic number, because the mean of its divisors is an integer number (111320334720).

Almost surely, 2^666066668331 is an apocalyptic number.

666066668331 is a deficient number, since it is larger than the sum of its proper divisors (224496009429).

666066668331 is a wasteful number, since it uses less digits than its factorization.

666066668331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618446665.

The product of its (nonzero) digits is 20155392, while the sum is 57.

The spelling of 666066668331 in words is "six hundred sixty-six billion, sixty-six million, six hundred sixty-eight thousand, three hundred thirty-one".