16662739 has 2 divisors, whose sum is σ = 16662740. Its totient is φ = 16662738.

The previous prime is 16662719. The next prime is 16662743. The reversal of 16662739 is 93726661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16662739 - 2²³ = 8274131 is a prime.

It is not a weakly prime, because it can be changed into another prime (16662719) 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, 8331369 + 8331370.

It is an arithmetic number, because the mean of its divisors is an integer number (8331370).

Almost surely, 2^16662739 is an apocalyptic number.

16662739 is a deficient number, since it is larger than the sum of its proper divisors (1).

16662739 is an equidigital number, since it uses as much as digits as its factorization.

16662739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 16662739 is about 4082.0018373342. The cubic root of 16662739 is about 255.4164105013.

The spelling of 16662739 in words is "sixteen million, six hundred sixty-two thousand, seven hundred thirty-nine".