57666347 has 2 divisors, whose sum is σ = 57666348. Its totient is φ = 57666346.

The previous prime is 57666319. The next prime is 57666353. The reversal of 57666347 is 74366675.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57666347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57666298 and 57666307.

It is not a weakly prime, because it can be changed into another prime (57666307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28833173 + 28833174.

It is an arithmetic number, because the mean of its divisors is an integer number (28833174).

Almost surely, 2^57666347 is an apocalyptic number.

57666347 is a deficient number, since it is larger than the sum of its proper divisors (1).

57666347 is an equidigital number, since it uses as much as digits as its factorization.

57666347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 44.

The square root of 57666347 is about 7593.8361188532. The cubic root of 57666347 is about 386.3439777889.

The spelling of 57666347 in words is "fifty-seven million, six hundred sixty-six thousand, three hundred forty-seven".