556664724 has 240 divisors, whose sum is σ = 1852937856. Its totient is φ = 141523200.

The previous prime is 556664683. The next prime is 556664729. The reversal of 556664724 is 427466655.

It is a super-2 number, since 2×556664724² = 619751229891992352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 556664724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556664729) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1322034 + ... + 1322454.

Almost surely, 2^556664724 is an apocalyptic number.

556664724 is a gapful number since it is divisible by the number (54) 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 556664724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926468928).

556664724 is an abundant number, since it is smaller than the sum of its proper divisors (1296273132).

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

556664724 is a wasteful number, since it uses less digits than its factorization.

556664724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 497 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 556664724 is about 23593.7433231779. The cubic root of 556664724 is about 822.6174166806.

The spelling of 556664724 in words is "five hundred fifty-six million, six hundred sixty-four thousand, seven hundred twenty-four".