66065999970 has 32 divisors (see below), whose sum is σ = 164025933120. Its totient is φ = 17010096320.

The previous prime is 66065999957. The next prime is 66066000031. The reversal of 66065999970 is 7999956066.

66065999970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37968096 + ... + 37969835.

It is an arithmetic number, because the mean of its divisors is an integer number (5125810410).

Almost surely, 2^66065999970 is an apocalyptic number.

66065999970 is an abundant number, since it is smaller than the sum of its proper divisors (97959933150).

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

66065999970 is a wasteful number, since it uses less digits than its factorization.

66065999970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75937970.

The product of its (nonzero) digits is 49601160, while the sum is 66.

The spelling of 66065999970 in words is "sixty-six billion, sixty-five million, nine hundred ninety-nine thousand, nine hundred seventy".