51660170 has 8 divisors (see below), whose sum is σ = 92988324. Its totient is φ = 20664064.

The previous prime is 51660137. The next prime is 51660173. The reversal of 51660170 is 7106615.

It can be written as a sum of positive squares in 2 ways, for example, as 48038761 + 3621409 = 6931^2 + 1903^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51660173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582999 + ... + 2583018.

Almost surely, 2^51660170 is an apocalyptic number.

51660170 is a deficient number, since it is larger than the sum of its proper divisors (41328154).

51660170 is a wasteful number, since it uses less digits than its factorization.

51660170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166024.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 51660170 is about 7187.5009565217. The cubic root of 51660170 is about 372.4362487179.

Adding to 51660170 its reverse (7106615), we get a palindrome (58766785).

The spelling of 51660170 in words is "fifty-one million, six hundred sixty thousand, one hundred seventy".