557821466 has 4 divisors (see below), whose sum is σ = 836732202. Its totient is φ = 278910732.

The previous prime is 557821463. The next prime is 557821483. The reversal of 557821466 is 664128755.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 544242241 + 13579225 = 23329^2 + 3685^2 .

It is a super-2 number, since 2×557821466² = 622329575860778312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (557821463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139455365 + ... + 139455368.

Almost surely, 2^557821466 is an apocalyptic number.

557821466 is a deficient number, since it is larger than the sum of its proper divisors (278910736).

557821466 is a wasteful number, since it uses less digits than its factorization.

557821466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278910735.

The product of its digits is 403200, while the sum is 44.

The square root of 557821466 is about 23618.2443462676. The cubic root of 557821466 is about 823.1868185291.

The spelling of 557821466 in words is "five hundred fifty-seven million, eight hundred twenty-one thousand, four hundred sixty-six".