66432429 has 12 divisors (see below), whose sum is σ = 109666336. Its totient is φ = 37961352.

The previous prime is 66432397. The next prime is 66432437. The reversal of 66432429 is 92423466.

66432429 is a `hidden beast` number, since 6 + 643 + 2 + 4 + 2 + 9 = 666.

It is not a de Polignac number, because 66432429 - 2⁵ = 66432397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66432393 and 66432402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66432439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 527179 + ... + 527304.

Almost surely, 2^66432429 is an apocalyptic number.

It is an amenable number.

66432429 is a deficient number, since it is larger than the sum of its proper divisors (43233907).

66432429 is a wasteful number, since it uses less digits than its factorization.

66432429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054496 (or 1054493 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 66432429 is about 8150.6091183420. The cubic root of 66432429 is about 405.0046821589.

The spelling of 66432429 in words is "sixty-six million, four hundred thirty-two thousand, four hundred twenty-nine".