66307142477 has 2 divisors, whose sum is σ = 66307142478. Its totient is φ = 66307142476.

The previous prime is 66307142453. The next prime is 66307142513. The reversal of 66307142477 is 77424170366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37368369481 + 28938772996 = 193309^2 + 170114^2 .

It is a cyclic number.

It is not a de Polignac number, because 66307142477 - 2⁶ = 66307142413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66307142437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33153571238 + 33153571239.

It is an arithmetic number, because the mean of its divisors is an integer number (33153571239).

Almost surely, 2^66307142477 is an apocalyptic number.

It is an amenable number.

66307142477 is a deficient number, since it is larger than the sum of its proper divisors (1).

66307142477 is an equidigital number, since it uses as much as digits as its factorization.

66307142477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 66307142477 in words is "sixty-six billion, three hundred seven million, one hundred forty-two thousand, four hundred seventy-seven".