66386434 has 8 divisors (see below), whose sum is σ = 99645948. Its totient is φ = 33171120.

The previous prime is 66386429. The next prime is 66386449. The reversal of 66386434 is 43468366.

It can be written as a sum of positive squares in 2 ways, for example, as 60793209 + 5593225 = 7797^2 + 2365^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6997 + ... + 13480.

Almost surely, 2^66386434 is an apocalyptic number.

66386434 is a deficient number, since it is larger than the sum of its proper divisors (33259514).

66386434 is a wasteful number, since it uses less digits than its factorization.

66386434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22100.

The product of its digits is 248832, while the sum is 40.

The square root of 66386434 is about 8147.7870615278. The cubic root of 66386434 is about 404.9111912168.

The spelling of 66386434 in words is "sixty-six million, three hundred eighty-six thousand, four hundred thirty-four".