1416663221 has 2 divisors, whose sum is σ = 1416663222. Its totient is φ = 1416663220.

The previous prime is 1416663187. The next prime is 1416663223. The reversal of 1416663221 is 1223666141.

1416663221 = 26614² + 26615².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 708358225 + 708304996 = 26615^2 + 26614^2 .

It is an emirp because it is prime and its reverse (1223666141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1416663221 - 2²² = 1412468917 is a prime.

Together with 1416663223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1416663223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 708331610 + 708331611.

It is an arithmetic number, because the mean of its divisors is an integer number (708331611).

Almost surely, 2^1416663221 is an apocalyptic number.

1416663221 is the 26615-th centered square number.

It is an amenable number.

1416663221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1416663221 is an equidigital number, since it uses as much as digits as its factorization.

1416663221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 1416663221 is about 37638.5868624209. The cubic root of 1416663221 is about 1123.1097729103.

The spelling of 1416663221 in words is "one billion, four hundred sixteen million, six hundred sixty-three thousand, two hundred twenty-one".