1333665648 has 120 divisors (see below), whose sum is σ = 4423689088. Its totient is φ = 381039552.

The previous prime is 1333665643. The next prime is 1333665653. The reversal of 1333665648 is 8465663331.

It is an interprime number because it is at equal distance from previous prime (1333665643) and next prime (1333665653).

It is a super-3 number, since 3×1333665648³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1333665643) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2715 + ... + 51717.

Almost surely, 2^1333665648 is an apocalyptic number.

1333665648 is a gapful number since it is divisible by the number (18) 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 1333665648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211844544).

1333665648 is an abundant number, since it is smaller than the sum of its proper divisors (3090023440).

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

1333665648 is an equidigital number, since it uses as much as digits as its factorization.

1333665648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49033 (or 49015 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 1333665648 is about 36519.3872894932. The cubic root of 1333665648 is about 1100.7338486070.

The spelling of 1333665648 in words is "one billion, three hundred thirty-three million, six hundred sixty-five thousand, six hundred forty-eight".