66770924609 has 2 divisors, whose sum is σ = 66770924610. Its totient is φ = 66770924608.

The previous prime is 66770924587. The next prime is 66770924611. The reversal of 66770924609 is 90642907766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44419777600 + 22351147009 = 210760^2 + 149503^2 .

It is a cyclic number.

It is not a de Polignac number, because 66770924609 - 2¹⁶ = 66770859073 is a prime.

Together with 66770924611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66770924309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33385462304 + 33385462305.

It is an arithmetic number, because the mean of its divisors is an integer number (33385462305).

Almost surely, 2^66770924609 is an apocalyptic number.

It is an amenable number.

66770924609 is a deficient number, since it is larger than the sum of its proper divisors (1).

66770924609 is an equidigital number, since it uses as much as digits as its factorization.

66770924609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 56.

The spelling of 66770924609 in words is "sixty-six billion, seven hundred seventy million, nine hundred twenty-four thousand, six hundred nine".