1366625721742 has 8 divisors (see below), whose sum is σ = 2078810957232. Its totient is φ = 673688736000.

The previous prime is 1366625721733. The next prime is 1366625721779. The reversal of 1366625721742 is 2471275266631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1366625721742³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1366625721742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4812062259 + ... + 4812062542.

It is an arithmetic number, because the mean of its divisors is an integer number (259851369654).

Almost surely, 2^{1366625721742} is an apocalyptic number.

1366625721742 is a deficient number, since it is larger than the sum of its proper divisors (712185235490).

1366625721742 is an equidigital number, since it uses as much as digits as its factorization.

1366625721742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624124874.

The product of its digits is 5080320, while the sum is 52.

The spelling of 1366625721742 in words is "one trillion, three hundred sixty-six billion, six hundred twenty-five million, seven hundred twenty-one thousand, seven hundred forty-two".