66201623873 has 64 divisors (see below), whose sum is σ = 89708290560. Its totient is φ = 47269478400.

The previous prime is 66201623869. The next prime is 66201623959. The reversal of 66201623873 is 37832610266.

It is a cyclic number.

It is not a de Polignac number, because 66201623873 - 2² = 66201623869 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66201643873) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35044913 + ... + 35046801.

It is an arithmetic number, because the mean of its divisors is an integer number (1401692040).

Almost surely, 2^66201623873 is an apocalyptic number.

It is an amenable number.

66201623873 is a deficient number, since it is larger than the sum of its proper divisors (23506666687).

66201623873 is a wasteful number, since it uses less digits than its factorization.

66201623873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 66201623873 in words is "sixty-six billion, two hundred one million, six hundred twenty-three thousand, eight hundred seventy-three".