1366261362725 has 48 divisors (see below), whose sum is σ = 2058271774080. Its totient is φ = 878768352000.

The previous prime is 1366261362671. The next prime is 1366261362731. The reversal of 1366261362725 is 5272631626631.

It is not a de Polignac number, because 1366261362725 - 2²⁴ = 1366244585509 is a prime.

It is a super-2 number, since 2×1366261362725² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1698362 + ... + 2370011.

It is an arithmetic number, because the mean of its divisors is an integer number (42880661960).

Almost surely, 2^{1366261362725} is an apocalyptic number.

It is an amenable number.

1366261362725 is a deficient number, since it is larger than the sum of its proper divisors (692010411355).

1366261362725 is a wasteful number, since it uses less digits than its factorization.

1366261362725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068510 (or 4068505 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 50.

The spelling of 1366261362725 in words is "one trillion, three hundred sixty-six billion, two hundred sixty-one million, three hundred sixty-two thousand, seven hundred twenty-five".