66420596 has 24 divisors (see below), whose sum is σ = 132318144. Its totient is φ = 28878080.

The previous prime is 66420559. The next prime is 66420671. The reversal of 66420596 is 69502466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31805 + ... + 33828.

It is an arithmetic number, because the mean of its divisors is an integer number (5513256).

Almost surely, 2^66420596 is an apocalyptic number.

It is an amenable number.

66420596 is a deficient number, since it is larger than the sum of its proper divisors (65897548).

66420596 is a wasteful number, since it uses less digits than its factorization.

66420596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65671 (or 65669 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 66420596 is about 8149.8831893469. The cubic root of 66420596 is about 404.9806341398.

The spelling of 66420596 in words is "sixty-six million, four hundred twenty thousand, five hundred ninety-six".