166415223550211 has 2 divisors, whose sum is σ = 166415223550212. Its totient is φ = 166415223550210.

The previous prime is 166415223550193. The next prime is 166415223550231. The reversal of 166415223550211 is 112055322514661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166415223550211 - 2²² = 166415219355907 is a prime.

It is not a weakly prime, because it can be changed into another prime (166415223550231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83207611775105 + 83207611775106.

It is an arithmetic number, because the mean of its divisors is an integer number (83207611775106).

Almost surely, 2^{166415223550211} is an apocalyptic number.

166415223550211 is a deficient number, since it is larger than the sum of its proper divisors (1).

166415223550211 is an equidigital number, since it uses as much as digits as its factorization.

166415223550211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 166415223550211 in words is "one hundred sixty-six trillion, four hundred fifteen billion, two hundred twenty-three million, five hundred fifty thousand, two hundred eleven".