66666065960 has 32 divisors (see below), whose sum is σ = 161537007240. Its totient is φ = 24615162624.

The previous prime is 66666065957. The next prime is 66666065971. The reversal of 66666065960 is 6956066666.

It can be written as a sum of positive squares in 4 ways, for example, as 22201596004 + 44464469956 = 149002^2 + 210866^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66666065896 and 66666065905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64101467 + ... + 64102506.

Almost surely, 2^66666065960 is an apocalyptic number.

It is an amenable number.

66666065960 is an abundant number, since it is smaller than the sum of its proper divisors (94870941280).

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

66666065960 is a wasteful number, since it uses less digits than its factorization.

66666065960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128203997 (or 128203993 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 56.

The spelling of 66666065960 in words is "sixty-six billion, six hundred sixty-six million, sixty-five thousand, nine hundred sixty".