66065660156477 has 2 divisors, whose sum is σ = 66065660156478. Its totient is φ = 66065660156476.

The previous prime is 66065660156453. The next prime is 66065660156527. The reversal of 66065660156477 is 77465106656066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62171111837956 + 3894548318521 = 7884866^2 + 1973461^2 .

It is a cyclic number.

It is not a de Polignac number, because 66065660156477 - 2²⁴ = 66065643379261 is a prime.

It is a super-2 number, since 2×66065660156477² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66065660156407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33032830078238 + 33032830078239.

It is an arithmetic number, because the mean of its divisors is an integer number (33032830078239).

Almost surely, 2^{66065660156477} is an apocalyptic number.

It is an amenable number.

66065660156477 is a deficient number, since it is larger than the sum of its proper divisors (1).

66065660156477 is an equidigital number, since it uses as much as digits as its factorization.

66065660156477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 228614400, while the sum is 65.

The spelling of 66065660156477 in words is "sixty-six trillion, sixty-five billion, six hundred sixty million, one hundred fifty-six thousand, four hundred seventy-seven".