1345666365 has 60 divisors (see below), whose sum is σ = 2562697236. Its totient is φ = 675412992.

The previous prime is 1345666351. The next prime is 1345666373. The reversal of 1345666365 is 5636665431.

It can be written as a sum of positive squares in 6 ways, for example, as 99082116 + 1246584249 = 9954^2 + 35307^2 .

It is not a de Polignac number, because 1345666365 - 2²³ = 1337277757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1345666365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 111297 + ... + 122793.

Almost surely, 2^1345666365 is an apocalyptic number.

1345666365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1345666365 is a deficient number, since it is larger than the sum of its proper divisors (1217030871).

1345666365 is a wasteful number, since it uses less digits than its factorization.

1345666365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11548 (or 11522 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The square root of 1345666365 is about 36683.3254354073. The cubic root of 1345666365 is about 1104.0255709460.

The spelling of 1345666365 in words is "one billion, three hundred forty-five million, six hundred sixty-six thousand, three hundred sixty-five".