1331366699520 has 1600 divisors, whose sum is σ = 5704633630080. Its totient is φ = 292493721600.

The previous prime is 1331366699407. The next prime is 1331366699563. The reversal of 1331366699520 is 259966631331.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1749495940 + ... + 1749496700.

Almost surely, 2^{1331366699520} is an apocalyptic number.

1331366699520 is a gapful number since it is divisible by the number (10) 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 1331366699520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2852316815040).

1331366699520 is an abundant number, since it is smaller than the sum of its proper divisors (4373266930560).

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

1331366699520 is a wasteful number, since it uses less digits than its factorization.

1331366699520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 54.

The spelling of 1331366699520 in words is "one trillion, three hundred thirty-one billion, three hundred sixty-six million, six hundred ninety-nine thousand, five hundred twenty".