1996665876 has 72 divisors (see below), whose sum is σ = 5243172480. Its totient is φ = 664396992.

The previous prime is 1996665871. The next prime is 1996665877. The reversal of 1996665876 is 6785666991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996665871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 697440 + ... + 700296.

It is an arithmetic number, because the mean of its divisors is an integer number (72821840).

Almost surely, 2^1996665876 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1996665876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2621586240).

1996665876 is an abundant number, since it is smaller than the sum of its proper divisors (3246506604).

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

1996665876 is a wasteful number, since it uses less digits than its factorization.

1996665876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3595 (or 3581 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The square root of 1996665876 is about 44684.0673618685. The cubic root of 1996665876 is about 1259.2205383167.

The spelling of 1996665876 in words is "one billion, nine hundred ninety-six million, six hundred sixty-five thousand, eight hundred seventy-six".