65066580 has 36 divisors (see below), whose sum is σ = 197369172. Its totient is φ = 17351040.

The previous prime is 65066537. The next prime is 65066587. The reversal of 65066580 is 8566056.

65066580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17539344 + 47527236 = 4188^2 + 6894^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65066587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180561 + ... + 180920.

It is an arithmetic number, because the mean of its divisors is an integer number (5482477).

Almost surely, 2^65066580 is an apocalyptic number.

65066580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65066580 is an abundant number, since it is smaller than the sum of its proper divisors (132302592).

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

65066580 is a wasteful number, since it uses less digits than its factorization.

65066580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361496 (or 361491 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 65066580 is about 8066.3858077828. The cubic root of 65066580 is about 402.2098110233.

The spelling of 65066580 in words is "sixty-five million, sixty-six thousand, five hundred eighty".