660466260 has 36 divisors (see below), whose sum is σ = 2003414868. Its totient is φ = 176124288.

The previous prime is 660466189. The next prime is 660466297. The reversal of 660466260 is 62664066.

It can be written as a sum of positive squares in 2 ways, for example, as 150700176 + 509766084 = 12276^2 + 22578^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1834449 + ... + 1834808.

It is an arithmetic number, because the mean of its divisors is an integer number (55650413).

Almost surely, 2^660466260 is an apocalyptic number.

660466260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660466260 is an abundant number, since it is smaller than the sum of its proper divisors (1342948608).

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

660466260 is a wasteful number, since it uses less digits than its factorization.

660466260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669272 (or 3669267 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 660466260 is about 25699.5381281454. The cubic root of 660466260 is about 870.8637478039.

The spelling of 660466260 in words is "six hundred sixty million, four hundred sixty-six thousand, two hundred sixty".