1366799616 has 576 divisors, whose sum is σ = 5192087040. Its totient is φ = 345047040.

The previous prime is 1366799537. The next prime is 1366799617. The reversal of 1366799616 is 6169976631.

1366799616 is a `hidden beast` number, since 13 + 6 + 6 + 7 + 9 + 9 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366799617) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25788646 + ... + 25788698.

It is an arithmetic number, because the mean of its divisors is an integer number (9014040).

Almost surely, 2^1366799616 is an apocalyptic number.

1366799616 is a gapful number since it is divisible by the number (16) 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 1366799616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2596043520).

1366799616 is an abundant number, since it is smaller than the sum of its proper divisors (3825287424).

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

1366799616 is a wasteful number, since it uses less digits than its factorization.

1366799616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 119 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 1366799616 is about 36970.2531232882. The cubic root of 1366799616 is about 1109.7750311059.

The spelling of 1366799616 in words is "one billion, three hundred sixty-six million, seven hundred ninety-nine thousand, six hundred sixteen".