400166116211 has 2 divisors, whose sum is σ = 400166116212. Its totient is φ = 400166116210.

The previous prime is 400166116171. The next prime is 400166116327. The reversal of 400166116211 is 112611661004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400166116211 is a prime.

It is not a weakly prime, because it can be changed into another prime (400166116111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200083058105 + 200083058106.

It is an arithmetic number, because the mean of its divisors is an integer number (200083058106).

Almost surely, 2^400166116211 is an apocalyptic number.

400166116211 is a deficient number, since it is larger than the sum of its proper divisors (1).

400166116211 is an equidigital number, since it uses as much as digits as its factorization.

400166116211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

Adding to 400166116211 its reverse (112611661004), we get a palindrome (512777777215).

The spelling of 400166116211 in words is "four hundred billion, one hundred sixty-six million, one hundred sixteen thousand, two hundred eleven".