57270066 has 64 divisors (see below), whose sum is σ = 141081600. Its totient is φ = 15132096.

The previous prime is 57270019. The next prime is 57270077. The reversal of 57270066 is 66007275.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33480 + ... + 35148.

It is an arithmetic number, because the mean of its divisors is an integer number (2204400).

Almost surely, 2^57270066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57270066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70540800).

57270066 is an abundant number, since it is smaller than the sum of its proper divisors (83811534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57270066 is a wasteful number, since it uses less digits than its factorization.

57270066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 57270066 is about 7567.6988576449. The cubic root of 57270066 is about 385.4569623292.

The spelling of 57270066 in words is "fifty-seven million, two hundred seventy thousand, sixty-six".