65663406 has 32 divisors (see below), whose sum is σ = 146916000. Its totient is φ = 21738240.

The previous prime is 65663393. The next prime is 65663431. The reversal of 65663406 is 60436656.

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 15 ways as a sum of consecutive naturals, for example, 3966 + ... + 12126.

It is an arithmetic number, because the mean of its divisors is an integer number (4591125).

Almost surely, 2^65663406 is an apocalyptic number.

65663406 is an abundant number, since it is smaller than the sum of its proper divisors (81252594).

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

65663406 is a wasteful number, since it uses less digits than its factorization.

65663406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321 (or 8315 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 65663406 is about 8103.2959960747. The cubic root of 65663406 is about 403.4358323079.

The spelling of 65663406 in words is "sixty-five million, six hundred sixty-three thousand, four hundred six".