66445534 has 8 divisors (see below), whose sum is σ = 99799560. Its totient is φ = 33179016.

The previous prime is 66445529. The next prime is 66445553. The reversal of 66445534 is 43554466.

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

It is a junction number, because it is equal to n+sod(n) for n = 66445493 and 66445502.

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 3 ways as a sum of consecutive naturals, for example, 19944 + ... + 23035.

It is an arithmetic number, because the mean of its divisors is an integer number (12474945).

Almost surely, 2^66445534 is an apocalyptic number.

66445534 is a deficient number, since it is larger than the sum of its proper divisors (33354026).

66445534 is a wasteful number, since it uses less digits than its factorization.

66445534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43754.

The product of its digits is 172800, while the sum is 37.

The square root of 66445534 is about 8151.4130063444. The cubic root of 66445534 is about 405.0313119113.

The spelling of 66445534 in words is "sixty-six million, four hundred forty-five thousand, five hundred thirty-four".