66923507902 has 16 divisors (see below), whose sum is σ = 100667498112. Its totient is φ = 33367806360.

The previous prime is 66923507899. The next prime is 66923507971. The reversal of 66923507902 is 20970532966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011613 + ... + 1075735.

It is an arithmetic number, because the mean of its divisors is an integer number (6291718632).

Almost surely, 2^66923507902 is an apocalyptic number.

66923507902 is a deficient number, since it is larger than the sum of its proper divisors (33743990210).

66923507902 is a wasteful number, since it uses less digits than its factorization.

66923507902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65583.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 66923507902 in words is "sixty-six billion, nine hundred twenty-three million, five hundred seven thousand, nine hundred two".