66934945850 has 12 divisors (see below), whose sum is σ = 124498999374. Its totient is φ = 26773978320.

The previous prime is 66934945807. The next prime is 66934945877. The reversal of 66934945850 is 5854943966.

66934945850 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 3 ways, for example, as 26853704641 + 40081241209 = 163871^2 + 200203^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66934945850.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 669349409 + ... + 669349508.

Almost surely, 2^66934945850 is an apocalyptic number.

66934945850 is a deficient number, since it is larger than the sum of its proper divisors (57564053524).

66934945850 is a wasteful number, since it uses less digits than its factorization.

66934945850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338698929 (or 1338698924 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 59.

The spelling of 66934945850 in words is "sixty-six billion, nine hundred thirty-four million, nine hundred forty-five thousand, eight hundred fifty".