51668386 has 32 divisors (see below), whose sum is σ = 97287552. Its totient is φ = 19992960.

The previous prime is 51668377. The next prime is 51668399. The reversal of 51668386 is 68386615.

It is a super-2 number, since 2×51668386² = 5339244223689992, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23110 + ... + 25246.

It is an arithmetic number, because the mean of its divisors is an integer number (3040236).

Almost surely, 2^51668386 is an apocalyptic number.

51668386 is a deficient number, since it is larger than the sum of its proper divisors (45619166).

51668386 is a wasteful number, since it uses less digits than its factorization.

51668386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314.

The product of its digits is 207360, while the sum is 43.

The square root of 51668386 is about 7188.0724815489. The cubic root of 51668386 is about 372.4559916779.

The spelling of 51668386 in words is "fifty-one million, six hundred sixty-eight thousand, three hundred eighty-six".