551494660 has 12 divisors (see below), whose sum is σ = 1158138828. Its totient is φ = 220597856.

The previous prime is 551494639. The next prime is 551494661. The reversal of 551494660 is 66494155.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 323424256 + 228070404 = 17984^2 + 15102^2 .

It is not an unprimeable number, because it can be changed into a prime (551494661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13787347 + ... + 13787386.

It is an arithmetic number, because the mean of its divisors is an integer number (96511569).

Almost surely, 2^551494660 is an apocalyptic number.

It is an amenable number.

551494660 is an abundant number, since it is smaller than the sum of its proper divisors (606644168).

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

551494660 is a wasteful number, since it uses less digits than its factorization.

551494660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27574742 (or 27574740 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 551494660 is about 23483.9234371091. The cubic root of 551494660 is about 820.0627851985.

The spelling of 551494660 in words is "five hundred fifty-one million, four hundred ninety-four thousand, six hundred sixty".