1340365663 has 32 divisors (see below), whose sum is σ = 1794006144. Its totient is φ = 971108352.

The previous prime is 1340365657. The next prime is 1340365681. The reversal of 1340365663 is 3665630431.

It is a cyclic number.

It is not a de Polignac number, because 1340365663 - 2⁹ = 1340365151 is a prime.

It is a super-2 number, since 2×1340365663² = 3593160221098859138, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340365063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45531 + ... + 68947.

It is an arithmetic number, because the mean of its divisors is an integer number (56062692).

Almost surely, 2^1340365663 is an apocalyptic number.

1340365663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1340365663 is a deficient number, since it is larger than the sum of its proper divisors (453640481).

1340365663 is a wasteful number, since it uses less digits than its factorization.

1340365663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23491.

The product of its (nonzero) digits is 116640, while the sum is 37.

The square root of 1340365663 is about 36611.0046707271. The cubic root of 1340365663 is about 1102.5740443858.

The spelling of 1340365663 in words is "one billion, three hundred forty million, three hundred sixty-five thousand, six hundred sixty-three".