66960678276 has 36 divisors (see below), whose sum is σ = 179218287612. Its totient is φ = 21007271424.

The previous prime is 66960678233. The next prime is 66960678347. The reversal of 66960678276 is 67287606966.

It can be written as a sum of positive squares in 2 ways, for example, as 38210084676 + 28750593600 = 195474^2 + 169560^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54705825 + ... + 54707048.

It is an arithmetic number, because the mean of its divisors is an integer number (4978285767).

Almost surely, 2^66960678276 is an apocalyptic number.

It is an amenable number.

66960678276 is an abundant number, since it is smaller than the sum of its proper divisors (112257609336).

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

66960678276 is a wasteful number, since it uses less digits than its factorization.

66960678276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109412900 (or 109412895 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 66960678276 in words is "sixty-six billion, nine hundred sixty million, six hundred seventy-eight thousand, two hundred seventy-six".