66002855973 has 4 divisors (see below), whose sum is σ = 88003807968. Its totient is φ = 44001903980.

The previous prime is 66002855969. The next prime is 66002856047. The reversal of 66002855973 is 37955820066.

It is a happy number.

66002855973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66002855973 - 2² = 66002855969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66002850973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11000475993 + ... + 11000475998.

It is an arithmetic number, because the mean of its divisors is an integer number (22000951992).

Almost surely, 2^66002855973 is an apocalyptic number.

It is an amenable number.

66002855973 is a deficient number, since it is larger than the sum of its proper divisors (22000951995).

66002855973 is a wasteful number, since it uses less digits than its factorization.

66002855973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22000951994.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 66002855973 in words is "sixty-six billion, two million, eight hundred fifty-five thousand, nine hundred seventy-three".