665546260 has 48 divisors (see below), whose sum is σ = 1514310336. Its totient is φ = 244726272.

The previous prime is 665546257. The next prime is 665546263. The reversal of 665546260 is 62645566.

It is an interprime number because it is at equal distance from previous prime (665546257) and next prime (665546263).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665546263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8142 + ... + 37381.

It is an arithmetic number, because the mean of its divisors is an integer number (31548132).

Almost surely, 2^665546260 is an apocalyptic number.

It is an amenable number.

665546260 is an abundant number, since it is smaller than the sum of its proper divisors (848764076).

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

665546260 is a wasteful number, since it uses less digits than its factorization.

665546260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45592 (or 45590 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 665546260 is about 25798.1832693700. The cubic root of 665546260 is about 873.0908076379.

The spelling of 665546260 in words is "six hundred sixty-five million, five hundred forty-six thousand, two hundred sixty".