1340661775 has 6 divisors (see below), whose sum is σ = 1662420632. Its totient is φ = 1072529400.

The previous prime is 1340661761. The next prime is 1340661787. The reversal of 1340661775 is 5771660431.

It is not a de Polignac number, because 1340661775 - 2²⁹ = 803790863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26813211 + ... + 26813260.

Almost surely, 2^1340661775 is an apocalyptic number.

1340661775 is a deficient number, since it is larger than the sum of its proper divisors (321758857).

1340661775 is an equidigital number, since it uses as much as digits as its factorization.

1340661775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53626481 (or 53626476 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 1340661775 is about 36615.0484773679. The cubic root of 1340661775 is about 1102.6552315262.

The spelling of 1340661775 in words is "one billion, three hundred forty million, six hundred sixty-one thousand, seven hundred seventy-five".