660660018960 has 80 divisors (see below), whose sum is σ = 2082758748480. Its totient is φ = 173189967360.

The previous prime is 660660018913. The next prime is 660660018971. The reversal of 660660018960 is 69810066066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 23314231 + ... + 23342550.

It is an arithmetic number, because the mean of its divisors is an integer number (26034484356).

Almost surely, 2^660660018960 is an apocalyptic number.

660660018960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

660660018960 is an abundant number, since it is smaller than the sum of its proper divisors (1422098729520).

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

660660018960 is a wasteful number, since it uses less digits than its factorization.

660660018960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46656856 (or 46656850 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 660660018960 in words is "six hundred sixty billion, six hundred sixty million, eighteen thousand, nine hundred sixty".