51668377 has 2 divisors, whose sum is σ = 51668378. Its totient is φ = 51668376.

The previous prime is 51668363. The next prime is 51668399. The reversal of 51668377 is 77386615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50851161 + 817216 = 7131^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 51668377 - 2⁷ = 51668249 is a prime.

It is not a weakly prime, because it can be changed into another prime (51668347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25834188 + 25834189.

It is an arithmetic number, because the mean of its divisors is an integer number (25834189).

Almost surely, 2^51668377 is an apocalyptic number.

It is an amenable number.

51668377 is a deficient number, since it is larger than the sum of its proper divisors (1).

51668377 is an equidigital number, since it uses as much as digits as its factorization.

51668377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 51668377 is about 7188.0718555117. The cubic root of 51668377 is about 372.4559700522.

The spelling of 51668377 in words is "fifty-one million, six hundred sixty-eight thousand, three hundred seventy-seven".