665063460 has 480 divisors, whose sum is σ = 2458874880. Its totient is φ = 149299200.

The previous prime is 665063453. The next prime is 665063473. The reversal of 665063460 is 64360566.

665063460 is a `hidden beast` number, since 66 + 506 + 34 + 60 = 666.

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 159 ways as a sum of consecutive naturals, for example, 16221040 + ... + 16221080.

It is an arithmetic number, because the mean of its divisors is an integer number (5122656).

Almost surely, 2^665063460 is an apocalyptic number.

665063460 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 665063460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1229437440).

665063460 is an abundant number, since it is smaller than the sum of its proper divisors (1793811420).

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

665063460 is a wasteful number, since it uses less digits than its factorization.

665063460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 665063460 is about 25788.8243237260. The cubic root of 665063460 is about 872.8796376379.

The spelling of 665063460 in words is "six hundred sixty-five million, sixty-three thousand, four hundred sixty".