51605066 has 8 divisors (see below), whose sum is σ = 78092964. Its totient is φ = 25574080.

The previous prime is 51605063. The next prime is 51605131. The reversal of 51605066 is 66050615.

51605066 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 48594841 + 3010225 = 6971^2 + 1735^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51605063) 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 3 ways as a sum of consecutive naturals, for example, 113945 + ... + 114396.

Almost surely, 2^51605066 is an apocalyptic number.

51605066 is a deficient number, since it is larger than the sum of its proper divisors (26487898).

51605066 is a wasteful number, since it uses less digits than its factorization.

51605066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228456.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 51605066 is about 7183.6666125315. Note that the first 4 decimals coincide. The cubic root of 51605066 is about 372.3037802654.

The spelling of 51605066 in words is "fifty-one million, six hundred five thousand, sixty-six".