1340666867 has 2 divisors, whose sum is σ = 1340666868. Its totient is φ = 1340666866.

The previous prime is 1340666863. The next prime is 1340666881. The reversal of 1340666867 is 7686660431.

It is a weak prime.

It is an emirp because it is prime and its reverse (7686660431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340666867 - 2² = 1340666863 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340666863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670333433 + 670333434.

It is an arithmetic number, because the mean of its divisors is an integer number (670333434).

Almost surely, 2^1340666867 is an apocalyptic number.

1340666867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340666867 is an equidigital number, since it uses as much as digits as its factorization.

1340666867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 1340666867 is about 36615.1180115536. The cubic root of 1340666867 is about 1102.6566275317.

The spelling of 1340666867 in words is "one billion, three hundred forty million, six hundred sixty-six thousand, eight hundred sixty-seven".