57506066 has 8 divisors (see below), whose sum is σ = 88590540. Its totient is φ = 27975888.

The previous prime is 57506047. The next prime is 57506069. The reversal of 57506066 is 66060575.

It can be written as a sum of positive squares in 2 ways, for example, as 53217025 + 4289041 = 7295^2 + 2071^2 .

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

It is not an unprimeable number, because it can be changed into a prime (57506069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388481 + ... + 388628.

Almost surely, 2^57506066 is an apocalyptic number.

57506066 is a deficient number, since it is larger than the sum of its proper divisors (31084474).

57506066 is a wasteful number, since it uses less digits than its factorization.

57506066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777148.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 57506066 is about 7583.2754136982. The cubic root of 57506066 is about 385.9857037847.

The spelling of 57506066 in words is "fifty-seven million, five hundred six thousand, sixty-six".