57666755520 has 1344 divisors, whose sum is σ = 245954580480. Its totient is φ = 12590899200.

The previous prime is 57666755477. The next prime is 57666755561. The reversal of 57666755520 is 2555766675.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1558560942 + ... + 1558560978.

It is an arithmetic number, because the mean of its divisors is an integer number (183001920).

Almost surely, 2^57666755520 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 57666755520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122977290240).

57666755520 is an abundant number, since it is smaller than the sum of its proper divisors (188287824960).

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

57666755520 is a wasteful number, since it uses less digits than its factorization.

57666755520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 13230000, while the sum is 54.

The spelling of 57666755520 in words is "fifty-seven billion, six hundred sixty-six million, seven hundred fifty-five thousand, five hundred twenty".