66000052 has 24 divisors (see below), whose sum is σ = 124608456. Its totient is φ = 30471168.

The previous prime is 66000049. The next prime is 66000071. The reversal of 66000052 is 25000066.

It can be written as a sum of positive squares in 4 ways, for example, as 16353936 + 49646116 = 4044^2 + 7046^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65999993 and 66000029.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5553 + ... + 12760.

It is an arithmetic number, because the mean of its divisors is an integer number (5192019).

Almost surely, 2^66000052 is an apocalyptic number.

It is an amenable number.

66000052 is a deficient number, since it is larger than the sum of its proper divisors (58608404).

66000052 is a wasteful number, since it uses less digits than its factorization.

66000052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18387 (or 18385 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 66000052 is about 8124.0416050141. The cubic root of 66000052 is about 404.1241081958.

The spelling of 66000052 in words is "sixty-six million, fifty-two", and thus it is an aban number, an eban number, and an uban number.