66056020 has 48 divisors (see below), whose sum is σ = 142965648. Its totient is φ = 25625600.

The previous prime is 66056017. The next prime is 66056051. The reversal of 66056020 is 2065066.

It can be written as a sum of positive squares in 8 ways, for example, as 56644 + 65999376 = 238^2 + 8124^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106752 + ... + 107368.

It is an arithmetic number, because the mean of its divisors is an integer number (2978451).

Almost surely, 2^66056020 is an apocalyptic number.

It is an amenable number.

66056020 is an abundant number, since it is smaller than the sum of its proper divisors (76909628).

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

66056020 is a wasteful number, since it uses less digits than its factorization.

66056020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66056020 is about 8127.4854659975. The cubic root of 66056020 is about 404.2383082459.

The spelling of 66056020 in words is "sixty-six million, fifty-six thousand, twenty".