4557166603920 has 720 divisors, whose sum is σ = 19458578999808. Its totient is φ = 948736696320.

The previous prime is 4557166603861. The next prime is 4557166603949. The reversal of 4557166603920 is 293066617554.

It is a tau number, because it is divible by the number of its divisors (720).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 18470007 + ... + 18715113.

Almost surely, 2^{4557166603920} is an apocalyptic number.

4557166603920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4557166603920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9729289499904).

4557166603920 is an abundant number, since it is smaller than the sum of its proper divisors (14901412395888).

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

4557166603920 is a wasteful number, since it uses less digits than its factorization.

4557166603920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245188 (or 245172 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 4557166603920 in words is "four trillion, five hundred fifty-seven billion, one hundred sixty-six million, six hundred three thousand, nine hundred twenty".