66434405 has 8 divisors (see below), whose sum is σ = 80100384. Its totient is φ = 52894800.

The previous prime is 66434369. The next prime is 66434443. The reversal of 66434405 is 50443466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66434405 - 2⁶ = 66434341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30431 + ... + 32540.

It is an arithmetic number, because the mean of its divisors is an integer number (10012548).

Almost surely, 2^66434405 is an apocalyptic number.

It is an amenable number.

66434405 is a deficient number, since it is larger than the sum of its proper divisors (13665979).

66434405 is a wasteful number, since it uses less digits than its factorization.

66434405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63187.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 66434405 is about 8150.7303353749. The cubic root of 66434405 is about 405.0086976743.

The spelling of 66434405 in words is "sixty-six million, four hundred thirty-four thousand, four hundred five".