66384963 has 6 divisors (see below), whose sum is σ = 95889404. Its totient is φ = 44256636.

The previous prime is 66384961. The next prime is 66385003. The reversal of 66384963 is 36948366.

66384963 is a `hidden beast` number, since 6 + 638 + 4 + 9 + 6 + 3 = 666.

It is not a de Polignac number, because 66384963 - 2¹ = 66384961 is a prime.

It is a super-2 number, since 2×66384963² = 8813926625022738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66384961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3688045 + ... + 3688062.

Almost surely, 2^66384963 is an apocalyptic number.

66384963 is a deficient number, since it is larger than the sum of its proper divisors (29504441).

66384963 is a wasteful number, since it uses less digits than its factorization.

66384963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7376113 (or 7376110 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 66384963 is about 8147.6967911183. The cubic root of 66384963 is about 404.9082005015.

The spelling of 66384963 in words is "sixty-six million, three hundred eighty-four thousand, nine hundred sixty-three".