665362080 has 384 divisors, whose sum is σ = 2482099200. Its totient is φ = 166182912.

The previous prime is 665362073. The next prime is 665362081. The reversal of 665362080 is 80263566.

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

It is not an unprimeable number, because it can be changed into a prime (665362081) 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, 5888104 + ... + 5888216.

It is an arithmetic number, because the mean of its divisors is an integer number (6463800).

Almost surely, 2^665362080 is an apocalyptic number.

665362080 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 665362080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1241049600).

665362080 is an abundant number, since it is smaller than the sum of its proper divisors (1816737120).

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

665362080 is a wasteful number, since it uses less digits than its factorization.

665362080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 665362080 is about 25794.6133911714. The cubic root of 665362080 is about 873.0102619216.

The spelling of 665362080 in words is "six hundred sixty-five million, three hundred sixty-two thousand, eighty".