1366992635904 has 216 divisors, whose sum is σ = 4592720689830. Its totient is φ = 390569066496.

The previous prime is 1366992635849. The next prime is 1366992635909. The reversal of 1366992635904 is 4095362996631.

1366992635904 is a `hidden beast` number, since 1 + 36 + 6 + 9 + 9 + 2 + 6 + 3 + 590 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 937705595904 + 429287040000 = 968352^2 + 655200^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1366992635909) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 146392 + ... + 1659944.

Almost surely, 2^{1366992635904} is an apocalyptic number.

1366992635904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366992635904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2296360344915).

1366992635904 is an abundant number, since it is smaller than the sum of its proper divisors (3225728053926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1366992635904 is a wasteful number, since it uses less digits than its factorization.

1366992635904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513595 (or 1513565 counting only the distinct ones).

The product of its (nonzero) digits is 56687040, while the sum is 63.

The spelling of 1366992635904 in words is "one trillion, three hundred sixty-six billion, nine hundred ninety-two million, six hundred thirty-five thousand, nine hundred four".