557166420 has 36 divisors (see below), whose sum is σ = 1690072020. Its totient is φ = 148577664.

The previous prime is 557166413. The next prime is 557166451. The reversal of 557166420 is 24661755.

It is a happy number.

557166420 is a `hidden beast` number, since 5 + 5 + 7 + 1 + 6 + 642 + 0 = 666.

557166420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 251476164 + 305690256 = 15858^2 + 17484^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1547505 + ... + 1547864.

It is an arithmetic number, because the mean of its divisors is an integer number (46946445).

Almost surely, 2^557166420 is an apocalyptic number.

It is an amenable number.

557166420 is an abundant number, since it is smaller than the sum of its proper divisors (1132905600).

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

557166420 is a wasteful number, since it uses less digits than its factorization.

557166420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095384 (or 3095379 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 557166420 is about 23604.3728999522. The cubic root of 557166420 is about 822.8644714026.

The spelling of 557166420 in words is "five hundred fifty-seven million, one hundred sixty-six thousand, four hundred twenty".