63966819 has 8 divisors (see below), whose sum is σ = 97473280. Its totient is φ = 36552456.

The previous prime is 63966809. The next prime is 63966823. The reversal of 63966819 is 91866936.

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

It is not a de Polignac number, because 63966819 - 2⁴ = 63966803 is a prime.

It is a super-2 number, since 2×63966819² = 8183507865957522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63966809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1522999 + ... + 1523040.

It is an arithmetic number, because the mean of its divisors is an integer number (12184160).

Almost surely, 2^63966819 is an apocalyptic number.

63966819 is a deficient number, since it is larger than the sum of its proper divisors (33506461).

63966819 is a wasteful number, since it uses less digits than its factorization.

63966819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046049.

The product of its digits is 419904, while the sum is 48.

The square root of 63966819 is about 7997.9259186367. The cubic root of 63966819 is about 399.9308609668.

The spelling of 63966819 in words is "sixty-three million, nine hundred sixty-six thousand, eight hundred nineteen".