666603260 has 48 divisors (see below), whose sum is σ = 1430091936. Its totient is φ = 260911872.

The previous prime is 666603257. The next prime is 666603283. The reversal of 666603260 is 62306666.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 666603260.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596222 + ... + 597338.

It is an arithmetic number, because the mean of its divisors is an integer number (29793582).

Almost surely, 2^666603260 is an apocalyptic number.

It is an amenable number.

666603260 is an abundant number, since it is smaller than the sum of its proper divisors (763488676).

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

666603260 is a wasteful number, since it uses less digits than its factorization.

666603260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 666603260 is about 25818.6610806990. The cubic root of 666603260 is about 873.5527684455.

The spelling of 666603260 in words is "six hundred sixty-six million, six hundred three thousand, two hundred sixty".