66343313940 has 24 divisors (see below), whose sum is σ = 185761279200. Its totient is φ = 17691550368.

The previous prime is 66343313917. The next prime is 66343313957. The reversal of 66343313940 is 4931334366.

66343313940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66343313892 and 66343313901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552860890 + ... + 552861009.

It is an arithmetic number, because the mean of its divisors is an integer number (7740053300).

Almost surely, 2^66343313940 is an apocalyptic number.

66343313940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66343313940 is an abundant number, since it is smaller than the sum of its proper divisors (119417965260).

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

66343313940 is a wasteful number, since it uses less digits than its factorization.

66343313940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105721911 (or 1105721909 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 42.

The spelling of 66343313940 in words is "sixty-six billion, three hundred forty-three million, three hundred thirteen thousand, nine hundred forty".