65471620 has 12 divisors (see below), whose sum is σ = 137490444. Its totient is φ = 26188640.

The previous prime is 65471603. The next prime is 65471621. The reversal of 65471620 is 2617456.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13660416 + 51811204 = 3696^2 + 7198^2 .

It is not an unprimeable number, because it can be changed into a prime (65471621) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1636771 + ... + 1636810.

It is an arithmetic number, because the mean of its divisors is an integer number (11457537).

Almost surely, 2^65471620 is an apocalyptic number.

It is an amenable number.

65471620 is an abundant number, since it is smaller than the sum of its proper divisors (72018824).

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

65471620 is a wasteful number, since it uses less digits than its factorization.

65471620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273590 (or 3273588 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 65471620 is about 8091.4535159018. The cubic root of 65471620 is about 403.0426716879.

The spelling of 65471620 in words is "sixty-five million, four hundred seventy-one thousand, six hundred twenty".