57665916 has 144 divisors (see below), whose sum is σ = 184923648. Its totient is φ = 14716800.

The previous prime is 57665911. The next prime is 57665939. The reversal of 57665916 is 61956675.

57665916 is a `hidden beast` number, since 57 + 6 + 6 + 591 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57665911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196666 + ... + 196958.

It is an arithmetic number, because the mean of its divisors is an integer number (1284192).

Almost surely, 2^57665916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57665916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92461824).

57665916 is an abundant number, since it is smaller than the sum of its proper divisors (127257732).

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

57665916 is a wasteful number, since it uses less digits than its factorization.

57665916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 387 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 57665916 is about 7593.8077405212. The cubic root of 57665916 is about 386.3430152710.

It can be divided in two parts, 576659 and 16, that added together give a palindrome (576675).

The spelling of 57665916 in words is "fifty-seven million, six hundred sixty-five thousand, nine hundred sixteen".