549666000 has 560 divisors, whose sum is σ = 2220014160. Its totient is φ = 130636800.

The previous prime is 549665999. The next prime is 549666023. The reversal of 549666000 is 666945.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 276623424 + 273042576 = 16632^2 + 16524^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 18953986 + ... + 18954014.

It is an arithmetic number, because the mean of its divisors is an integer number (3964311).

Almost surely, 2^549666000 is an apocalyptic number.

549666000 is a gapful number since it is divisible by the number (50) 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 549666000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110007080).

549666000 is an abundant number, since it is smaller than the sum of its proper divisors (1670348160).

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

549666000 is a wasteful number, since it uses less digits than its factorization.

549666000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 549666000 is about 23444.9568137798. The cubic root of 549666000 is about 819.1553865297.

The spelling of 549666000 in words is "five hundred forty-nine million, six hundred sixty-six thousand".