400666327 has 2 divisors, whose sum is σ = 400666328. Its totient is φ = 400666326.

The previous prime is 400666307. The next prime is 400666339. The reversal of 400666327 is 723666004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400666327 - 2¹⁵ = 400633559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400666292 and 400666301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400666307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200333163 + 200333164.

It is an arithmetic number, because the mean of its divisors is an integer number (200333164).

Almost surely, 2^400666327 is an apocalyptic number.

400666327 is a deficient number, since it is larger than the sum of its proper divisors (1).

400666327 is an equidigital number, since it uses as much as digits as its factorization.

400666327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 400666327 is about 20016.6512434023. The cubic root of 400666327 is about 737.2152010365.

The spelling of 400666327 in words is "four hundred million, six hundred sixty-six thousand, three hundred twenty-seven".