57447666 has 48 divisors (see below), whose sum is σ = 129729600. Its totient is φ = 18350304.

The previous prime is 57447653. The next prime is 57447671. The reversal of 57447666 is 66674475.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86845 + ... + 87503.

It is an arithmetic number, because the mean of its divisors is an integer number (2702700).

Almost surely, 2^57447666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57447666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64864800).

57447666 is an abundant number, since it is smaller than the sum of its proper divisors (72281934).

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

57447666 is a wasteful number, since it uses less digits than its factorization.

57447666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863 (or 860 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 57447666 is about 7579.4238567321. The cubic root of 57447666 is about 385.8549975733.

The spelling of 57447666 in words is "fifty-seven million, four hundred forty-seven thousand, six hundred sixty-six".