1366679081 has 2 divisors, whose sum is σ = 1366679082. Its totient is φ = 1366679080.

The previous prime is 1366679077. The next prime is 1366679161. The reversal of 1366679081 is 1809766631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1179235600 + 187443481 = 34340^2 + 13691^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366679081 - 2² = 1366679077 is a prime.

It is a super-2 number, since 2×1366679081² = 3735623420886009122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1366672081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683339540 + 683339541.

It is an arithmetic number, because the mean of its divisors is an integer number (683339541).

Almost surely, 2^1366679081 is an apocalyptic number.

It is an amenable number.

1366679081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366679081 is an equidigital number, since it uses as much as digits as its factorization.

1366679081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 1366679081 is about 36968.6229253944. The cubic root of 1366679081 is about 1109.7424072879.

The spelling of 1366679081 in words is "one billion, three hundred sixty-six million, six hundred seventy-nine thousand, eighty-one".