666104611 has 2 divisors, whose sum is σ = 666104612. Its totient is φ = 666104610.

The previous prime is 666104609. The next prime is 666104617. The reversal of 666104611 is 116401666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666104611 - 2¹ = 666104609 is a prime.

It is a super-2 number, since 2×666104611² = 887390705590922642, which contains 22 as substring.

Together with 666104609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (666104617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333052305 + 333052306.

It is an arithmetic number, because the mean of its divisors is an integer number (333052306).

Almost surely, 2^666104611 is an apocalyptic number.

666104611 is a deficient number, since it is larger than the sum of its proper divisors (1).

666104611 is an equidigital number, since it uses as much as digits as its factorization.

666104611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 666104611 is about 25809.0025185012. The cubic root of 666104611 is about 873.3348952863.

The spelling of 666104611 in words is "six hundred sixty-six million, one hundred four thousand, six hundred eleven".