63727966 has 4 divisors (see below), whose sum is σ = 95591952. Its totient is φ = 31863982.

The previous prime is 63727927. The next prime is 63727969. The reversal of 63727966 is 66972736.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×63727966² = 8122507300994312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63727969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15931990 + ... + 15931993.

It is an arithmetic number, because the mean of its divisors is an integer number (23897988).

Almost surely, 2^63727966 is an apocalyptic number.

63727966 is a deficient number, since it is larger than the sum of its proper divisors (31863986).

63727966 is a wasteful number, since it uses less digits than its factorization.

63727966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31863985.

The product of its digits is 571536, while the sum is 46.

The square root of 63727966 is about 7982.9797694846. The cubic root of 63727966 is about 399.4324576200.

The spelling of 63727966 in words is "sixty-three million, seven hundred twenty-seven thousand, nine hundred sixty-six".