1366723504421 has 4 divisors (see below), whose sum is σ = 1490971095744. Its totient is φ = 1242475913100.

The previous prime is 1366723504417. The next prime is 1366723504427. The reversal of 1366723504421 is 1244053276631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1366723504421 - 2² = 1366723504417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366723504427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62123795645 + ... + 62123795666.

It is an arithmetic number, because the mean of its divisors is an integer number (372742773936).

Almost surely, 2^{1366723504421} is an apocalyptic number.

1366723504421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1366723504421 is a deficient number, since it is larger than the sum of its proper divisors (124247591323).

1366723504421 is a wasteful number, since it uses less digits than its factorization.

1366723504421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124247591322.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 1366723504421 in words is "one trillion, three hundred sixty-six billion, seven hundred twenty-three million, five hundred four thousand, four hundred twenty-one".