216370066739 has 2 divisors, whose sum is σ = 216370066740. Its totient is φ = 216370066738.

The previous prime is 216370066697. The next prime is 216370066747. The reversal of 216370066739 is 937660073612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216370066739 - 2²⁸ = 216101631283 is a prime.

It is not a weakly prime, because it can be changed into another prime (216370065739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108185033369 + 108185033370.

It is an arithmetic number, because the mean of its divisors is an integer number (108185033370).

Almost surely, 2^216370066739 is an apocalyptic number.

216370066739 is a deficient number, since it is larger than the sum of its proper divisors (1).

216370066739 is an equidigital number, since it uses as much as digits as its factorization.

216370066739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 50.

The spelling of 216370066739 in words is "two hundred sixteen billion, three hundred seventy million, sixty-six thousand, seven hundred thirty-nine".