57066618 has 16 divisors (see below), whose sum is σ = 130438080. Its totient is φ = 16304736.

The previous prime is 57066587. The next prime is 57066619. The reversal of 57066618 is 81666075.

It is not an unprimeable number, because it can be changed into a prime (57066619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679323 + ... + 679406.

It is an arithmetic number, because the mean of its divisors is an integer number (8152380).

Almost surely, 2^57066618 is an apocalyptic number.

57066618 is an abundant number, since it is smaller than the sum of its proper divisors (73371462).

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

57066618 is a wasteful number, since it uses less digits than its factorization.

57066618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358741.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 57066618 is about 7554.2450317686. The cubic root of 57066618 is about 384.9999842582. Note that the first 4 decimals are identical.

The spelling of 57066618 in words is "fifty-seven million, sixty-six thousand, six hundred eighteen".