57408661 has 4 divisors (see below), whose sum is σ = 59388300. Its totient is φ = 55429024.

The previous prime is 57408653. The next prime is 57408727. The reversal of 57408661 is 16680475.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24850225 + 32558436 = 4985^2 + 5706^2 .

It is a cyclic number.

It is not a de Polignac number, because 57408661 - 2³ = 57408653 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 57408661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57408641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989776 + ... + 989833.

It is an arithmetic number, because the mean of its divisors is an integer number (14847075).

Almost surely, 2^57408661 is an apocalyptic number.

It is an amenable number.

57408661 is a deficient number, since it is larger than the sum of its proper divisors (1979639).

57408661 is a wasteful number, since it uses less digits than its factorization.

57408661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979638.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 57408661 is about 7576.8503350667. The cubic root of 57408661 is about 385.7676503538.

The spelling of 57408661 in words is "fifty-seven million, four hundred eight thousand, six hundred sixty-one".