665529480 has 512 divisors, whose sum is σ = 2836684800. Its totient is φ = 134784000.

The previous prime is 665529479. The next prime is 665529517. The reversal of 665529480 is 84925566.

665529480 is a `hidden beast` number, since 6 + 6 + 552 + 94 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4407405 + ... + 4407555.

It is an arithmetic number, because the mean of its divisors is an integer number (5540400).

Almost surely, 2^665529480 is an apocalyptic number.

665529480 is a gapful number since it is divisible by the number (60) 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 665529480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418342400).

665529480 is an abundant number, since it is smaller than the sum of its proper divisors (2171155320).

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

665529480 is a wasteful number, since it uses less digits than its factorization.

665529480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 665529480 is about 25797.8580506212. The cubic root of 665529480 is about 873.0834700128.

The spelling of 665529480 in words is "six hundred sixty-five million, five hundred twenty-nine thousand, four hundred eighty".