66566434 has 8 divisors (see below), whose sum is σ = 108926928. Its totient is φ = 30257460.

The previous prime is 66566419. The next prime is 66566447. The reversal of 66566434 is 43466566.

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, 1512852 + ... + 1512895.

It is an arithmetic number, because the mean of its divisors is an integer number (13615866).

Almost surely, 2^66566434 is an apocalyptic number.

66566434 is a deficient number, since it is larger than the sum of its proper divisors (42360494).

66566434 is a wasteful number, since it uses less digits than its factorization.

66566434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025760.

The product of its digits is 311040, while the sum is 40.

The square root of 66566434 is about 8158.8255282240. The cubic root of 66566434 is about 405.2768193357.

The spelling of 66566434 in words is "sixty-six million, five hundred sixty-six thousand, four hundred thirty-four".