216370066747 has 2 divisors, whose sum is σ = 216370066748. Its totient is φ = 216370066746.

The previous prime is 216370066739. The next prime is 216370066771. The reversal of 216370066747 is 747660073612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216370066747 - 2³ = 216370066739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216370066747.

It is not a weakly prime, because it can be changed into another prime (216370066777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108185033373 + 108185033374.

It is an arithmetic number, because the mean of its divisors is an integer number (108185033374).

Almost surely, 2^216370066747 is an apocalyptic number.

216370066747 is a deficient number, since it is larger than the sum of its proper divisors (1).

216370066747 is an equidigital number, since it uses as much as digits as its factorization.

216370066747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1778112, while the sum is 49.

The spelling of 216370066747 in words is "two hundred sixteen billion, three hundred seventy million, sixty-six thousand, seven hundred forty-seven".