1366905977 has 2 divisors, whose sum is σ = 1366905978. Its totient is φ = 1366905976.

The previous prime is 1366905941. The next prime is 1366905997. The reversal of 1366905977 is 7795096631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1260321001 + 106584976 = 35501^2 + 10324^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366905977 - 2⁶ = 1366905913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1366905997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683452988 + 683452989.

It is an arithmetic number, because the mean of its divisors is an integer number (683452989).

Almost surely, 2^1366905977 is an apocalyptic number.

It is an amenable number.

1366905977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366905977 is an equidigital number, since it uses as much as digits as its factorization.

1366905977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2143260, while the sum is 53.

The square root of 1366905977 is about 36971.6915625996. The cubic root of 1366905977 is about 1109.8038170179.

The spelling of 1366905977 in words is "one billion, three hundred sixty-six million, nine hundred five thousand, nine hundred seventy-seven".