555660864 has 448 divisors, whose sum is σ = 1966325760. Its totient is φ = 152064000.

The previous prime is 555660811. The next prime is 555660869. The reversal of 555660864 is 468066555.

It is a happy number.

555660864 is a `hidden beast` number, since 5 + 5 + 566 + 0 + 86 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555660869) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13552684 + ... + 13552724.

It is an arithmetic number, because the mean of its divisors is an integer number (4389120).

Almost surely, 2^555660864 is an apocalyptic number.

555660864 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 555660864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983162880).

555660864 is an abundant number, since it is smaller than the sum of its proper divisors (1410664896).

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

555660864 is a wasteful number, since it uses less digits than its factorization.

555660864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The square root of 555660864 is about 23572.4598631539. The cubic root of 555660864 is about 822.1226307533.

The spelling of 555660864 in words is "five hundred fifty-five million, six hundred sixty thousand, eight hundred sixty-four".