66434427 has 12 divisors (see below), whose sum is σ = 96951400. Its totient is φ = 43832448.

The previous prime is 66434369. The next prime is 66434443. The reversal of 66434427 is 72443466.

66434427 is a `hidden beast` number, since 6 + 643 + 4 + 4 + 2 + 7 = 666.

It is not a de Polignac number, because 66434427 - 2⁶ = 66434363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66434391 and 66434400.

It is not an unprimeable number, because it can be changed into a prime (66434477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37177 + ... + 38922.

Almost surely, 2^66434427 is an apocalyptic number.

66434427 is a deficient number, since it is larger than the sum of its proper divisors (30516973).

66434427 is a wasteful number, since it uses less digits than its factorization.

66434427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76202 (or 76199 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The square root of 66434427 is about 8150.7316849471. The cubic root of 66434427 is about 405.0087423810.

The spelling of 66434427 in words is "sixty-six million, four hundred thirty-four thousand, four hundred twenty-seven".