66356434 has 4 divisors (see below), whose sum is σ = 99534654. Its totient is φ = 33178216.

The previous prime is 66356419. The next prime is 66356443. The reversal of 66356434 is 43465366.

66356434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 46580625 + 19775809 = 6825^2 + 4447^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66356393 and 66356402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16589107 + ... + 16589110.

Almost surely, 2^66356434 is an apocalyptic number.

66356434 is a deficient number, since it is larger than the sum of its proper divisors (33178220).

66356434 is a wasteful number, since it uses less digits than its factorization.

66356434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33178219.

The product of its digits is 155520, while the sum is 37.

The square root of 66356434 is about 8145.9458628204. The cubic root of 66356434 is about 404.8501889645.

The spelling of 66356434 in words is "sixty-six million, three hundred fifty-six thousand, four hundred thirty-four".