63966969 has 32 divisors (see below), whose sum is σ = 106193280. Its totient is φ = 37713600.

The previous prime is 63966967. The next prime is 63966983. The reversal of 63966969 is 96966936.

It is not a de Polignac number, because 63966969 - 2¹ = 63966967 is a prime.

It is a super-2 number, since 2×63966969² = 8183546246093922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63966961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8079 + ... + 13899.

It is an arithmetic number, because the mean of its divisors is an integer number (3318540).

Almost surely, 2^63966969 is an apocalyptic number.

It is an amenable number.

63966969 is a deficient number, since it is larger than the sum of its proper divisors (42226311).

63966969 is a wasteful number, since it uses less digits than its factorization.

63966969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5878 (or 5872 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 54.

The square root of 63966969 is about 7997.9352960624. The cubic root of 63966969 is about 399.9311735747.

The spelling of 63966969 in words is "sixty-three million, nine hundred sixty-six thousand, nine hundred sixty-nine".