665460140 has 24 divisors (see below), whose sum is σ = 1404715200. Its totient is φ = 264803328.

The previous prime is 665460139. The next prime is 665460143. The reversal of 665460140 is 41064566.

It is a junction number, because it is equal to n+sod(n) for n = 665460097 and 665460106.

It is not an unprimeable number, because it can be changed into a prime (665460143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82340 + ... + 90059.

It is an arithmetic number, because the mean of its divisors is an integer number (58529800).

Almost surely, 2^665460140 is an apocalyptic number.

It is an amenable number.

665460140 is an abundant number, since it is smaller than the sum of its proper divisors (739255060).

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

665460140 is a wasteful number, since it uses less digits than its factorization.

665460140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172601 (or 172599 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 665460140 is about 25796.5141055919. The cubic root of 665460140 is about 873.0531474340.

The spelling of 665460140 in words is "six hundred sixty-five million, four hundred sixty thousand, one hundred forty".