66465800 has 48 divisors (see below), whose sum is σ = 162675600. Its totient is φ = 25185600.

The previous prime is 66465779. The next prime is 66465811. The reversal of 66465800 is 856466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4946 + ... + 12545.

It is an arithmetic number, because the mean of its divisors is an integer number (3389075).

Almost surely, 2^66465800 is an apocalyptic number.

It is an amenable number.

66465800 is an abundant number, since it is smaller than the sum of its proper divisors (96209800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66465800 is a wasteful number, since it uses less digits than its factorization.

66465800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17526 (or 17517 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 66465800 is about 8152.6560089335. The cubic root of 66465800 is about 405.0724861367.

The spelling of 66465800 in words is "sixty-six million, four hundred sixty-five thousand, eight hundred".