57220066 has 8 divisors (see below), whose sum is σ = 86149980. Its totient is φ = 28503408.

The previous prime is 57220049. The next prime is 57220081. The reversal of 57220066 is 66002275.

It can be written as a sum of positive squares in 2 ways, for example, as 56625625 + 594441 = 7525^2 + 771^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52641 + ... + 53716.

Almost surely, 2^57220066 is an apocalyptic number.

57220066 is a deficient number, since it is larger than the sum of its proper divisors (28929914).

57220066 is a wasteful number, since it uses less digits than its factorization.

57220066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106628.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 57220066 is about 7564.3946221757. The cubic root of 57220066 is about 385.3447544404.

The spelling of 57220066 in words is "fifty-seven million, two hundred twenty thousand, sixty-six".