66082320 has 60 divisors (see below), whose sum is σ = 221928876. Its totient is φ = 17621760.

The previous prime is 66082309. The next prime is 66082339. The reversal of 66082320 is 2328066.

It can be written as a sum of positive squares in 2 ways, for example, as 21566736 + 44515584 = 4644^2 + 6672^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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 11 ways as a sum of consecutive naturals, for example, 45171 + ... + 46610.

Almost surely, 2^66082320 is an apocalyptic number.

66082320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66082320 is an abundant number, since it is smaller than the sum of its proper divisors (155846556).

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

66082320 is a wasteful number, since it uses less digits than its factorization.

66082320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91800 (or 91791 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66082320 is about 8129.1032715792. The cubic root of 66082320 is about 404.2919498714.

The spelling of 66082320 in words is "sixty-six million, eighty-two thousand, three hundred twenty".