63967966 has 4 divisors (see below), whose sum is σ = 95951952. Its totient is φ = 31983982.

The previous prime is 63967963. The next prime is 63967993. The reversal of 63967966 is 66976936.

63967966 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 is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63967963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15991990 + ... + 15991993.

It is an arithmetic number, because the mean of its divisors is an integer number (23987988).

Almost surely, 2^63967966 is an apocalyptic number.

63967966 is a deficient number, since it is larger than the sum of its proper divisors (31983986).

63967966 is a wasteful number, since it uses less digits than its factorization.

63967966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31983985.

The product of its digits is 2204496, while the sum is 52.

The square root of 63967966 is about 7997.9976244057. The cubic root of 63967966 is about 399.9332513622.

The spelling of 63967966 in words is "sixty-three million, nine hundred sixty-seven thousand, nine hundred sixty-six".