66935150866 has 16 divisors (see below), whose sum is σ = 101409764760. Its totient is φ = 33131980800.

The previous prime is 66935150839. The next prime is 66935150869. The reversal of 66935150866 is 66805153966.

66935150866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 63950823225 + 2984327641 = 252885^2 + 54629^2 .

It is not an unprimeable number, because it can be changed into a prime (66935150869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2078560 + ... + 2110516.

Almost surely, 2^66935150866 is an apocalyptic number.

66935150866 is a deficient number, since it is larger than the sum of its proper divisors (34474613894).

66935150866 is a wasteful number, since it uses less digits than its factorization.

66935150866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42429.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 66935150866 in words is "sixty-six billion, nine hundred thirty-five million, one hundred fifty thousand, eight hundred sixty-six".