66343394976 has 24 divisors (see below), whose sum is σ = 174151412064. Its totient is φ = 22114464960.

The previous prime is 66343394969. The next prime is 66343394981. The reversal of 66343394976 is 67949334366.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345538420 + ... + 345538611.

It is an arithmetic number, because the mean of its divisors is an integer number (7256308836).

Almost surely, 2^66343394976 is an apocalyptic number.

It is an amenable number.

66343394976 is an abundant number, since it is smaller than the sum of its proper divisors (107808017088).

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

66343394976 is a wasteful number, since it uses less digits than its factorization.

66343394976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691077044 (or 691077036 counting only the distinct ones).

The product of its digits is 52907904, while the sum is 60.

The spelling of 66343394976 in words is "sixty-six billion, three hundred forty-three million, three hundred ninety-four thousand, nine hundred seventy-six".