666046123 has 2 divisors, whose sum is σ = 666046124. Its totient is φ = 666046122.

The previous prime is 666046109. The next prime is 666046133. The reversal of 666046123 is 321640666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666046123 is a prime.

It is a super-2 number, since 2×666046123² = 887234875926662258, which contains 22 as substring.

It is equal to p_34583911 and since 666046123 and 34583911 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (666046133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333023061 + 333023062.

It is an arithmetic number, because the mean of its divisors is an integer number (333023062).

Almost surely, 2^666046123 is an apocalyptic number.

666046123 is a deficient number, since it is larger than the sum of its proper divisors (1).

666046123 is an equidigital number, since it uses as much as digits as its factorization.

666046123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 666046123 is about 25807.8694006305. The cubic root of 666046123 is about 873.3093331820.

Adding to 666046123 its reverse (321640666), we get a palindrome (987686789).

It can be divided in two parts, 66604 and 6123, that added together give a palindrome (72727).

The spelling of 666046123 in words is "six hundred sixty-six million, forty-six thousand, one hundred twenty-three".