665550060 has 48 divisors (see below), whose sum is σ = 2129761536. Its totient is φ = 152125632.

The previous prime is 665550049. The next prime is 665550091. The reversal of 665550060 is 60055566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 791902 + ... + 792741.

It is an arithmetic number, because the mean of its divisors is an integer number (44370032).

Almost surely, 2^665550060 is an apocalyptic number.

665550060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665550060 is an abundant number, since it is smaller than the sum of its proper divisors (1464211476).

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

665550060 is a wasteful number, since it uses less digits than its factorization.

665550060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584662 (or 1584660 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 665550060 is about 25798.2569178617. The cubic root of 665550060 is about 873.0924692999.

It can be divided in two parts, 665 and 550060, that added together give a triangular number (550725 = T₁₀₄₉).

The spelling of 665550060 in words is "six hundred sixty-five million, five hundred fifty thousand, sixty".