66560164 has 36 divisors (see below), whose sum is σ = 129271212. Its totient is φ = 29962240.

The previous prime is 66560147. The next prime is 66560167. The reversal of 66560164 is 46106566.

It can be written as a sum of positive squares in 2 ways, for example, as 8952064 + 57608100 = 2992^2 + 7590^2 .

It is not an unprimeable number, because it can be changed into a prime (66560167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54084 + ... + 55300.

It is an arithmetic number, because the mean of its divisors is an integer number (3590867).

Almost surely, 2^66560164 is an apocalyptic number.

It is an amenable number.

66560164 is a deficient number, since it is larger than the sum of its proper divisors (62711048).

66560164 is a wasteful number, since it uses less digits than its factorization.

66560164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356 (or 1343 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 66560164 is about 8158.4412726942. The cubic root of 66560164 is about 405.2640943766.

The spelling of 66560164 in words is "sixty-six million, five hundred sixty thousand, one hundred sixty-four".