66307961966 has 8 divisors (see below), whose sum is σ = 101338583544. Its totient is φ = 32528434120.

The previous prime is 66307961957. The next prime is 66307961981. The reversal of 66307961966 is 66916970366.

66307961966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312773300 + ... + 312773511.

It is an arithmetic number, because the mean of its divisors is an integer number (12667322943).

Almost surely, 2^66307961966 is an apocalyptic number.

66307961966 is a deficient number, since it is larger than the sum of its proper divisors (35030621578).

66307961966 is a wasteful number, since it uses less digits than its factorization.

66307961966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625546866.

The product of its (nonzero) digits is 13226976, while the sum is 59.

The spelling of 66307961966 in words is "sixty-six billion, three hundred seven million, nine hundred sixty-one thousand, nine hundred sixty-six".