63613045666 has 4 divisors (see below), whose sum is σ = 95419568502. Its totient is φ = 31806522832.

The previous prime is 63613045651. The next prime is 63613045667. The reversal of 63613045666 is 66654031636.

63613045666 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.

It can be written as a sum of positive squares in only one way, i.e., 60518460025 + 3094585641 = 246005^2 + 55629^2 .

It is not an unprimeable number, because it can be changed into a prime (63613045667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15903261415 + ... + 15903261418.

Almost surely, 2^63613045666 is an apocalyptic number.

63613045666 is a deficient number, since it is larger than the sum of its proper divisors (31806522836).

63613045666 is a wasteful number, since it uses less digits than its factorization.

63613045666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31806522835.

The product of its (nonzero) digits is 1399680, while the sum is 46.

The spelling of 63613045666 in words is "sixty-three billion, six hundred thirteen million, forty-five thousand, six hundred sixty-six".