63667677812 has 6 divisors (see below), whose sum is σ = 111418436178. Its totient is φ = 31833838904.

The previous prime is 63667677793. The next prime is 63667677817. The reversal of 63667677812 is 21877676636.

It can be written as a sum of positive squares in only one way, i.e., 52534473616 + 11133204196 = 229204^2 + 105514^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63667677817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7958459723 + ... + 7958459730.

It is an arithmetic number, because the mean of its divisors is an integer number (18569739363).

Almost surely, 2^63667677812 is an apocalyptic number.

It is an amenable number.

63667677812 is a deficient number, since it is larger than the sum of its proper divisors (47750758366).

63667677812 is a wasteful number, since it uses less digits than its factorization.

63667677812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15916919457 (or 15916919455 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 59.

The spelling of 63667677812 in words is "sixty-three billion, six hundred sixty-seven million, six hundred seventy-seven thousand, eight hundred twelve".