57666397 has 8 divisors (see below), whose sum is σ = 62479296. Its totient is φ = 53011392.

The previous prime is 57666353. The next prime is 57666409. The reversal of 57666397 is 79366675.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57666397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57666397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57666307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38713 + ... + 40174.

It is an arithmetic number, because the mean of its divisors is an integer number (7809912).

Almost surely, 2^57666397 is an apocalyptic number.

It is an amenable number.

57666397 is a deficient number, since it is larger than the sum of its proper divisors (4812899).

57666397 is a wasteful number, since it uses less digits than its factorization.

57666397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78947.

The product of its digits is 1428840, while the sum is 49.

The square root of 57666397 is about 7593.8394109963. The cubic root of 57666397 is about 386.3440894496.

The spelling of 57666397 in words is "fifty-seven million, six hundred sixty-six thousand, three hundred ninety-seven".