65554820 has 24 divisors (see below), whose sum is σ = 138173784. Its totient is φ = 26125056.

The previous prime is 65554817. The next prime is 65554843. The reversal of 65554820 is 2845556.

It can be written as a sum of positive squares in 4 ways, for example, as 10705984 + 54848836 = 3272^2 + 7406^2 .

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 7 ways as a sum of consecutive naturals, for example, 377 + ... + 11456.

It is an arithmetic number, because the mean of its divisors is an integer number (5757241).

Almost surely, 2^65554820 is an apocalyptic number.

It is an amenable number.

65554820 is an abundant number, since it is smaller than the sum of its proper divisors (72618964).

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

65554820 is a wasteful number, since it uses less digits than its factorization.

65554820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12119 (or 12117 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 65554820 is about 8096.5931106855. The cubic root of 65554820 is about 403.2133255574.

The spelling of 65554820 in words is "sixty-five million, five hundred fifty-four thousand, eight hundred twenty".