66463439 has 4 divisors (see below), whose sum is σ = 75958224. Its totient is φ = 56968656.

The previous prime is 66463429. The next prime is 66463451. The reversal of 66463439 is 93436466.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66463439 - 2¹² = 66459343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66463396 and 66463405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66463429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4747382 + ... + 4747395.

It is an arithmetic number, because the mean of its divisors is an integer number (18989556).

Almost surely, 2^66463439 is an apocalyptic number.

66463439 is a deficient number, since it is larger than the sum of its proper divisors (9494785).

66463439 is an equidigital number, since it uses as much as digits as its factorization.

66463439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9494784.

The product of its digits is 279936, while the sum is 41.

The square root of 66463439 is about 8152.5112082106. The cubic root of 66463439 is about 405.0676897479.

The spelling of 66463439 in words is "sixty-six million, four hundred sixty-three thousand, four hundred thirty-nine".