1066777007447 has 2 divisors, whose sum is σ = 1066777007448. Its totient is φ = 1066777007446.

The previous prime is 1066777007423. The next prime is 1066777007497. The reversal of 1066777007447 is 7447007776601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1066777007447 - 2¹⁰ = 1066777006423 is a prime.

It is a super-2 number, since 2×1066777007447² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066777007392 and 1066777007401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066777007497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533388503723 + 533388503724.

It is an arithmetic number, because the mean of its divisors is an integer number (533388503724).

Almost surely, 2^{1066777007447} is an apocalyptic number.

1066777007447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066777007447 is an equidigital number, since it uses as much as digits as its factorization.

1066777007447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9680832, while the sum is 56.

The spelling of 1066777007447 in words is "one trillion, sixty-six billion, seven hundred seventy-seven million, seven thousand, four hundred forty-seven".