65565630 has 48 divisors (see below), whose sum is σ = 183587040. Its totient is φ = 16138944.

The previous prime is 65565613. The next prime is 65565653. The reversal of 65565630 is 3656556.

It is a happy number.

65565630 is a `hidden beast` number, since 65 + 565 + 6 + 30 = 666.

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 23 ways as a sum of consecutive naturals, for example, 26850 + ... + 29189.

It is an arithmetic number, because the mean of its divisors is an integer number (3824730).

Almost surely, 2^65565630 is an apocalyptic number.

65565630 is an abundant number, since it is smaller than the sum of its proper divisors (118021410).

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

65565630 is a wasteful number, since it uses less digits than its factorization.

65565630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56065 (or 56062 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 65565630 is about 8097.2606478982. The cubic root of 65565630 is about 403.2354876526.

The spelling of 65565630 in words is "sixty-five million, five hundred sixty-five thousand, six hundred thirty".