1066774777 has 4 divisors (see below), whose sum is σ = 1092793716. Its totient is φ = 1040755840.

The previous prime is 1066774763. The next prime is 1066774781. The reversal of 1066774777 is 7774776601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7774776601 = 19597 ⋅396733.

It can be written as a sum of positive squares in 2 ways, for example, as 54007801 + 1012766976 = 7349^2 + 31824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066774777 - 2²³ = 1058386169 is a prime.

It is a super-2 number, since 2×1066774777² = 2276016849686799458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066774717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13009408 + ... + 13009489.

It is an arithmetic number, because the mean of its divisors is an integer number (273198429).

Almost surely, 2^1066774777 is an apocalyptic number.

It is an amenable number.

1066774777 is a deficient number, since it is larger than the sum of its proper divisors (26018939).

1066774777 is an equidigital number, since it uses as much as digits as its factorization.

1066774777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26018938.

The product of its (nonzero) digits is 2420208, while the sum is 52.

The square root of 1066774777 is about 32661.5182898775. The cubic root of 1066774777 is about 1021.7804278453.

The spelling of 1066774777 in words is "one billion, sixty-six million, seven hundred seventy-four thousand, seven hundred seventy-seven".