66210494596 has 9 divisors (see below), whose sum is σ = 115869266149. Its totient is φ = 33104989984.

The previous prime is 66210494561. The next prime is 66210494659. The reversal of 66210494596 is 69549401266.

The square root of 66210494596 is 257314.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 22419072900 + 43791421696 = 149730^2 + 209264^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 450300 + ... + 578956.

Almost surely, 2^66210494596 is an apocalyptic number.

66210494596 is the 257314-th square number.

It is an amenable number.

66210494596 is a deficient number, since it is larger than the sum of its proper divisors (49658771553).

66210494596 is an frugal number, since it uses more digits than its factorization.

66210494596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257318 (or 128659 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 66210494596 in words is "sixty-six billion, two hundred ten million, four hundred ninety-four thousand, five hundred ninety-six".