63381966 has 8 divisors (see below), whose sum is σ = 126763944. Its totient is φ = 21127320.

The previous prime is 63381959. The next prime is 63382003. The reversal of 63381966 is 66918336.

It is a sphenic number, since it is the product of 3 distinct primes.

63381966 is an admirable number.

It is a super-2 number, since 2×63381966² = 8034547228050312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5281825 + ... + 5281836.

It is an arithmetic number, because the mean of its divisors is an integer number (15845493).

Almost surely, 2^63381966 is an apocalyptic number.

63381966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63381966 is a wasteful number, since it uses less digits than its factorization.

63381966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10563666.

The product of its digits is 139968, while the sum is 42.

The square root of 63381966 is about 7961.2791685759. The cubic root of 63381966 is about 398.7082621906.

The spelling of 63381966 in words is "sixty-three million, three hundred eighty-one thousand, nine hundred sixty-six".