551287660 has 192 divisors, whose sum is σ = 1544417280. Its totient is φ = 160116480.

The previous prime is 551287571. The next prime is 551287661. The reversal of 551287660 is 66782155.

It is not an unprimeable number, because it can be changed into a prime (551287661) 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, 2428467 + ... + 2428693.

It is an arithmetic number, because the mean of its divisors is an integer number (8043840).

Almost surely, 2^551287660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551287660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772208640).

551287660 is an abundant number, since it is smaller than the sum of its proper divisors (993129620).

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

551287660 is a wasteful number, since it uses less digits than its factorization.

551287660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 551287660 is about 23479.5157530985. The cubic root of 551287660 is about 819.9601705818.

The spelling of 551287660 in words is "five hundred fifty-one million, two hundred eighty-seven thousand, six hundred sixty".