51666346 has 16 divisors (see below), whose sum is σ = 78424200. Its totient is φ = 25527040.

The previous prime is 51666343. The next prime is 51666347. The reversal of 51666346 is 64366615.

51666346 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 4 ways, for example, as 23629321 + 28037025 = 4861^2 + 5295^2 .

It is a super-2 number, since 2×51666346² = 5338822617983432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51666343) 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 7 ways as a sum of consecutive naturals, for example, 83430 + ... + 84046.

Almost surely, 2^51666346 is an apocalyptic number.

51666346 is a deficient number, since it is larger than the sum of its proper divisors (26757854).

51666346 is a wasteful number, since it uses less digits than its factorization.

51666346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049.

The product of its digits is 77760, while the sum is 37.

The square root of 51666346 is about 7187.9305784071. The cubic root of 51666346 is about 372.4510897751.

The spelling of 51666346 in words is "fifty-one million, six hundred sixty-six thousand, three hundred forty-six".