66434371 has 4 divisors (see below), whose sum is σ = 66476592. Its totient is φ = 66392152.

The previous prime is 66434369. The next prime is 66434443. The reversal of 66434371 is 17343466.

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 66434371 - 2¹ = 66434369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66434321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18655 + ... + 21928.

It is an arithmetic number, because the mean of its divisors is an integer number (16619148).

Almost surely, 2^66434371 is an apocalyptic number.

66434371 is a deficient number, since it is larger than the sum of its proper divisors (42221).

66434371 is a wasteful number, since it uses less digits than its factorization.

66434371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42220.

The product of its digits is 36288, while the sum is 34.

The square root of 66434371 is about 8150.7282496719. The cubic root of 66434371 is about 405.0086285821.

The spelling of 66434371 in words is "sixty-six million, four hundred thirty-four thousand, three hundred seventy-one".