16366663 has 2 divisors, whose sum is σ = 16366664. Its totient is φ = 16366662.

The previous prime is 16366661. The next prime is 16366681. The reversal of 16366663 is 36666361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16366663 - 2¹ = 16366661 is a prime.

Together with 16366661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16366661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8183331 + 8183332.

It is an arithmetic number, because the mean of its divisors is an integer number (8183332).

Almost surely, 2^16366663 is an apocalyptic number.

16366663 is a deficient number, since it is larger than the sum of its proper divisors (1).

16366663 is an equidigital number, since it uses as much as digits as its factorization.

16366663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 37.

The square root of 16366663 is about 4045.5732597495. The cubic root of 16366663 is about 253.8945508509.

The spelling of 16366663 in words is "sixteen million, three hundred sixty-six thousand, six hundred sixty-three".